<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "http://jats.nlm.nih.gov/publishing/1.3/JATS-journalpublishing1-3.dtd">
<article xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" article-type="research-article" dtd-version="1.3" xml:lang="en">
  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">CLAC</journal-id>
      <journal-title-group>
        <journal-title specific-use="original" xml:lang="es">Círculo de Lingüística Aplicada a la Comunicación</journal-title>
      </journal-title-group>
      <issn publication-format="electronic">1576-4737</issn>
      <issn-l>1576-4737</issn-l>
      <publisher>
        <publisher-name>Ediciones Complutense</publisher-name>
        <publisher-loc>España</publisher-loc>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.5209/clac.100073</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Monográfico</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Teaching and learning chinese as a heritage language (CHL)</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-2121-6410</contrib-id>
          <name>
            <surname>Zhang</surname>
            <given-names>Huichao (Claire)</given-names>
          </name>
          <xref ref-type="aff" rid="aff-a"/>
          <xref ref-type="corresp" rid="cor1"/>
        </contrib>
        <contrib contrib-type="author" corresp="yes">
          <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5294-6437</contrib-id>
          <name>
            <surname>Gong (corresponding author)</surname>
            <given-names>Yang (Frank)</given-names>
          </name>
          <xref ref-type="aff" rid="aff-a"/>
          <xref ref-type="corresp" rid="cor2"/>
        </contrib>
        <contrib contrib-type="author" corresp="yes">
          <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3233-1683</contrib-id>
          <name>
            <surname>Zhang</surname>
            <given-names>Luyao (Elva)</given-names>
          </name>
          <xref ref-type="aff" rid="aff-a"/>
          <xref ref-type="corresp" rid="cor3"/>
        </contrib>
        <aff id="aff-a"><institution content-type="original">University of Macau, China</institution></aff>
      </contrib-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3426-8721</contrib-id>
          <name>
            <surname>Gao</surname>
            <given-names>Gao</given-names>
          </name>
          <xref ref-type="aff" rid="aff-b"/>
          <xref ref-type="corresp" rid="cor4"/>
        </contrib>
        <aff id="aff-b"><institution content-type="original">University of New South Wales</institution></aff>
      </contrib-group>
      <author-notes>
        <corresp id="cor1">Huichao (Claire) Zhang<email>yc27106@um.edu.mo</email></corresp>
        <corresp id="cor2">Yang (Frank) Gong (corresponding author)<email>frankgong@um.edu.mo</email></corresp>
        <corresp id="cor3">Luyao (Elva) Zhang<email>yc17121@um.edu.mo</email></corresp>
        <corresp id="cor4">Xuesong (Andy) Gao<email>xuesong.gao@unsw.edu.au</email></corresp>
      </author-notes>
      <pub-date pub-type="epub" publication-format="electronic" iso-8601-date="2025-02-14">
        <day>14</day>
        <month>02</month>
        <year>2025</year>
      </pub-date>
      <volume>101</volume>
      <issue>1</issue>
      <fpage>95</fpage>
      <lpage>109</lpage>
      <page-range>95-109</page-range>
      <permissions>
        <copyright-statement>Copyright © 2025, Universidad Complutense de
          Madrid</copyright-statement>
        <copyright-year>2025</copyright-year>
        <copyright-holder>Universidad Complutense de Madrid</copyright-holder>
        <license license-type="open-access"
          xlink:href="https://creativecommons.org/licenses/by/4.0/">
          <ali:license_ref>https://creativecommons.org/licenses/by/4.0/</ali:license_ref>
          <license-p>Esta obra está bajo una licencia <ext-link ext-link-type="uri"
              xlink:href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution
              4.0 International</ext-link></license-p>
        </license>
      </permissions>
      <abstract>
        <p>Research on Chinese heritage language (CHL) education has flourished in recent decades,
          driven by the increasing presence of CHL learners in schools worldwide, especially in
          multiethnic and multilingual contexts such as the USA, Canada, and Australia. This article
          presents the findings of a systematic review of 53 empirical studies on CHL education
          indexed in the Social Science Citation Index (SSCI) and published from 2008 to 2023. The
          study reveals that CHL research primarily focuses on four core areas: CHL maintenance, CHL
          acquisition, CHL pedagogy, and CHL learners’ identity. The research methodologies within
          the existing literature show a predominance of quantitative studies, particularly
          laboratory-based research on CHL acquisition, and the results highlight the critical role
          of the home environment in supporting CHL maintenance. This review concludes with
          recommendations for advancing future research on and pedagogy practices of CHL.
          Specifically, CHL education needs to incorporate sociolinguistically-informed pedagogical
          approaches and materials and implement valid assessment tools to address the diverse needs
          and interests of CHL learners. Future research should further investigate how CHL
          learners’ ethnic identities are shaped by and interact with gender, socio-economic status,
          and dialect backgrounds, while assessing tailored interventions and engaging in
          classroom-based action research to enhance pedagogy and longterm language transmission
          across generations.</p>
      </abstract>
      <kwd-group>
        <kwd>Chinese heritage language (CHL)</kwd>
        <kwd>systematic review,</kwd>
        <kwd>heritage language learner identity</kwd>
        <kwd>heritage language maintenance</kwd>
        <kwd>language pedagogy</kwd>
      </kwd-group>
    </article-meta>
  </front>
<body>

<sec id="introduction">
  <title>1. Introduction</title>
  <p>The rise in global transnational mobility has increased the numbers
  of immigrant minorities in Anglophone countries (e.g., the USA, New
  Zealand), promoting significant research attention to heritage
  languages (He, 2006). Heritage languages are defined as non-mainstream
  and no-societal languages that are often first spoken by linguistic
  minorities who are exposed to both their home language and the
  majority language (e.g., Comanaru &amp; Noels, 2009; Mu, 2016).
  Examples of minority languages in different regions worldwide include
  Spanish, East Asian languages, Russian, and Arabic (Montrul, 2010).
  Chinese has a growing population of speakers residing outside China.
  Over the last two decades China’s economic growth has greatly enhanced
  the global status of the Chinese language; not only is it a heritage
  language serving as an important link to Chinese culture and history,
  it has also become a form of linguistic capital for the job market
  (Francis et al., 2009; Gong et al., 2020; Mu, 2014).</p>
  <p>Learners of Chinese as a heritage language (CHL) typically
  experience early exposure to Chinese at home, but they may develop
  only latent or tacit knowledge of the language and quickly adopt the
  dominant language of their wider community once they begin formal
  schooling (Duff &amp; Doherty, 2019). As a result, most CHL learners
  develop a strong proficiency in the majority language, but their
  proficiency and literacy in their heritage language can vary
  considerably (Montrul, 2010; Polinsky et al., 2010).</p>
  <p>Given that CHL learners represent an increasingly significant subsection of global Chinese
        language learners (Mu &amp; Dooley, 2015) and considering the contextual complexities and
        linguistic challenges inherent in teaching and learning CHL, a growing number of researchers
        (e.g., Chen et al., 2023; Mu &amp; Dooley, 2015) have examined issues related to cultural
        identity and language maintenance while learning CHL, as well as pedagogical practices in
        the CHL classroom. Although there are existing review articles on teaching and learning
        Chinese as a foreign or second language (CFL/CSL) (e.g., Gong et al., 2018), there has been
        a notable absence of systematic reviews specifically addressing CHL education. This lack of
        focused attention hinders a nuanced understanding of the sociocultural, familial, and
        educational complexities associated with teaching and learning CHL, which are distinct from
        those experienced by CFL/CSL learners. The absence of such a review risks perpetuating gaps
        in research and practice, ultimately limiting the development of targeted, effective
        pedagogical strategies and educational policies that could enhance CHL learning outcomes and
        cultural integration.</p>
  <p>To address this research gap, this article systematically reviews existing empirical studies on
        CHL education from 2008 to 2023 (n=53). The review aims to: (1) identify the methodological
        approaches in the reviewed studies; and (2) interpret and synthesize existing findings about
        teaching and learning CHL in order to provide an in-depth and holistic understanding of the
        complexities of the linguistic and sociocultural landscape of CHL. By examining the
        methodologies and coverage of these studies, the review intends to identify the research
        gaps in relation to CHL education and indicate relevant directions for future studies. Thus,
        this study aims to address the following two questions:</p>
  <p>RQ1: What kinds of methodological approaches have been adopted in
  existing research on teaching and learning CHL?</p>
  <p>RQ2: What are the research topics of existing studies on teaching
  and learning CHL?</p>
</sec>
<sec id="methodology">
  <title>2. Methodology</title>
  <p>This review adhered to the five principles for systematic reviews
  (Evans &amp; Benefield, 2001), which are: (1) establishing explicit
  criteria for selecting studies; (2) employing a comprehensive search
  strategy to identify all relevant studies; (3) ensuring a transparent
  process for literature selection; (4) implementing strategies to
  minimize biased data analysis, and (5) conducting a systematic
  synthesis of the findings.</p>
  <sec id="eligibility-criteria">
    <title>2.1. Eligibility criteria</title>
    <p>The research team collaborated to establish criteria for
    inclusion and exclusion in order to identify relevant research on
    CHL education. Publications were limited to journal articles indexed
    in the Social Sciences Citation Index (SSCI) and published in
    English between 2008 and 2023, given that 2008 marked the start of a
    period of significant research attention on CHL education
    (Curdt-Christiansen, 2008). In addition, articles in SSCI journals
    undergo a rigorous evaluation process before publication, thus
    maintaining high standards of quality and reliability in the
    reviewed research (Booth et al., 2021). The specific criteria for
    study eligibility were: (1) only empirical studies (i.e.,
    qualitative, quantitative, or mixed methods research) were included;
    and (2) research primarily focused on Mandarin Chinese as a heritage
    language due to its popularity (Ruggles et al., 2004) in comparison
    with other Chinese variants (e.g., Cantonese, Fujianese).</p>
  </sec>
  <sec id="literature-identification">
    <title>2.2. Literature identification</title>
    <p>The initial literature search was conducted in October 2023, and
    was updated in February 2024 to identify any new research published
    since the initial search. To maximize the scope of the research, the
    literature search included key education databases (Stentiford &amp;
    Koutsouris, 2021), namely Web of Science, Scopus, and Education
    Resources Information Center (ERIC). The search strings used in
    these databases were:</p>
    <list list-type="order">
      <list-item>
        <p>heritage (‘speaker*’ OR ‘learner*’OR) AND (Chinese OR
        Mandarin)</p>
      </list-item>
      <list-item>
        <p>heritage AND (Chinese OR Mandarin)</p>
      </list-item>
      <list-item>
        <p>Chinese heritage language (CHL) teaching OR learning</p>
      </list-item>
    </list>
  </sec>
  <sec id="selection-process">
    <title>2.3. Selection process</title>
    <p>The publication selection process followed the PRISMA flow (Moher et al., 2009) as shown in
          <xref ref-type="fig" rid="figure1">Figure 1</xref>. The first author conducted an initial round of searches combining search string,
          publication type, and year of publication; this yielded 1,352 results (1,345 from database
          research, 7 from reference lists). Duplicates and articles not indexed in the SSCI were
          removed, before the first author screened the titles and abstracts of the remaining 298
          articles for eligibility based on the criterion of empirical studies focusing on CHL
          education. After this screening, 184 studies remained. Further exclusions were made based
          on inadequate focus on CHL teaching and learning, or a focus on Chinese variants other
          than Mandarin Chinese (e.g., Cantonese or Fujianese), resulting in 53 studies meeting the
          final inclusion criteria. To ensure the eligibility of these studies for inclusion, both
          the first and the second author independently read the content of the potential
          publications, and differences of opinion about the inclusion of particular studies were
          discussed until a consensus was reached.</p>
    <fig id="figure1">
      <caption><p>Figure 1. PRISMA flow diagram for the systematic review</p></caption>
      <graphic mimetype="image" mime-subtype="jpeg" xlink:href="media/image1.jpeg" />
    </fig>
  </sec>
  <sec id="data-analysis">
    <title>2.4. Data analysis</title>
    <p>This review employed thematic synthesis (Thomas &amp; Harden, 2008) to integrate the findings
          from the included studies and identify the main themes that emerged from the texts. The
          data analysis involved three phases, with Microsoft Excel used for coding data. Initially,
          the first author carefully read each study several times to become familiar with the
          content. Then, the following data was compiled in the Excel database: author name(s) and
          year, research context and participants, research questions, research design and
          instruments, and key findings. Third, an inductive approach was used to analyze and
          synthesize all the findings to identify the research foci, topic trends, and development
          trajectories in research on CHL education. While the first author performed the coding,
          the main themes were reviewed and validated by two additional researchers with expertise
          in the field of higher education.</p>
  </sec>
</sec>
<sec id="findings-and-discussion">
  <title>3. Findings and discussion</title>
  <p>Before we address the research questions, some general observations involving publication
        trends and geographical distribution emerged as we analyzed the studies. Over the past 15
        years there has been a notable increase in terms of the number of research studies on CHL
        education, especially in the most recent three years (see <xref ref-type="fig" rid="figure2">Figure 2</xref>). This indicates the
        growing global mobility of Chinese people and their families (Yang, C. T., 2023).</p>
  <p>Through an analysis of the participants recruited by these studies, we found that 47 out of the
        53 studies recruited CHL learners spanning various age groups as participants, with 13
        studies concentrating on children (under 12 years old), 6 studies on teenagers (12 to 18
        years old), 19 studies on university students and adults (over 18 years old), and 9 studies
        on mixed groups. The largest number of adult CHL learner studies is consistent with the
        convenience of sample access to university students, who often participate in credit-bearing
        Chinese language-related courses or study abroad programs in China (Tong &amp; Tsung, 2023).
        Compared to teenagers and college students, children were reported to have a greater level
        of exposure to the Chinese language via family members or heritage language schools, making
        them important in studies on CHL education (Tang &amp; Zheng, 2023). However, as CHL
        children grow up they encounter increasing pressure to assimilate into the dominant society
        and increasingly busy schedules, which often diminish their motivation and effort related to
        learning Chinese. However, there is a lack of research on language attrition during this
        critical period, despite conflicting learning attitudes that may arise as a result of
        parental and teacher expectations (Zhang &amp; Slaughter-Defoe, 2009).</p>
  <fig id="figure2">
    <caption><p>Figure 2. Number of studies on teaching and learning CHL</p></caption>
    <graphic mimetype="image" mime-subtype="jpeg" xlink:href="media/image2.jpeg" />
  </fig>
  <p>Consequently, researchers such as Wu and Leung (2022) and Zhang (2012) adopted a broader
        sampling approach, including CHL learners ranging from children to teenagers in order to
        better investigate the evolving challenges related to teaching and learning CHL. In
        addition, these studies (e.g., Tian, 2017; Yang, C. T., 2023; Yang, Y., 2023) mostly
        included the learners’ parents or educators to provide a more holistic perspective of the
        relevant issues, such as academic struggles and ethnic identity formation. Five studies
        focused on parents and educators in the context of CHL education, examining their roles in
        maintaining CHL learners’ Chinese proficiency (e.g., Tang &amp; Zheng, 2023; Wang &amp;
        Hamid, 2022). Two studies explored textbooks (CurdtChristiansen, 2008) and educational
        institutions (Luo et al., 2019) related to teaching and learning CHL.</p>
  <p>The studies were geographically diverse and covered a variety of regions with significant
        Chinese diaspora populations, but they were predominantly focused on Anglophone countries
        (n=43) such as the USA, Canada, the UK, Australia, and New Zealand (see <xref ref-type="fig" rid="figure3">Figure 3</xref>). The high
        numbers of CHL studies in these countries may be attributed to their popularity as
        destinations for education, study abroad, and international exchanges, driven by the global
        spread of English and the internationalization of higher education. However, research based
        in other regions with increasing Chinese diaspora populations, such as Europe and Asia,
        especially those with societal languages other than English, remains limited (n=10). To
        address this gap, future research should expand to include these regions in order to explore
        the potential nature of CHL education in different cultural and linguistic contexts (Li
        &amp; Shen, 2023).</p>
  <p>This section partially addresses RQ1 by detailing participant types
  and settings, including the age groups of learners and the involvement
  of parents and educators. It also responds to RQ2 by identifying
  research topics such as CHL maintenance and ethnic identity formation.
  The regional focus on Anglophone countries highlights gaps in research
  from non-English-speaking regions.</p>
  <fig id="figure3">
    <caption><p>Figure 3. Regional distribution of studies on teaching and learning CHL</p></caption>
    <graphic mimetype="image" mime-subtype="jpeg" xlink:href="media/image3.jpeg" />
  </fig>
  <p>Furthermore, these studies were conducted primarily in five different types of contexts,
        including home (13 studies), classroom (12 studies), home and classroom (6 studies),
        laboratory (13 studies), and individual (9 studies). Studies on CHL in naturalistic or
        non-instructional contexts, typically within homes, focused on family language policies,
        parental involvement, and informal language practices, highlighting the role of the domestic
        environment in supporting or hindering heritage language maintenance. Classroom-based and
        laboratory-based studies examined formal educational practices such as teaching methods,
        curriculum design, and the integration of technology, providing insights into structured
        educational settings where CHL learning took place. The distribution of these research
        contexts potentially indicates that immigrant families constitute the dominant space where
        heritage languages are maintained (Duff &amp; Doherty, 2019), and highlights the importance
        of relevant studies to address the practical challenges encountered by transnational
        families.</p>
  <p>In what follows, we address the first research question (RQ1) by examining the methodological
        approaches employed in existing research on teaching and learning CHL. This analysis aims to
        provide the insights and knowledge needed to inform researchers in their choice of research
        methods and their role in shaping key perspectives or paradigms in CHL education. We also
        respond to the second research question (RQ2) by identifying the key research topics that
        have emerged from these studies, offering a comprehensive view of the field’s current
        focus.</p>
  <sec id="methodological-approaches-in-studies-on-chl-education">
    <title>3.1. Methodological approaches in studies on CHL education</title>
    <p>Our analysis identified that the studies on CHL teaching and learning could be divided into
          cross-sectional, longitudinal, and experimental studies according to their methodological
          approaches. Cross-sectional studies examined representative samples from various national
          backgrounds, phases of education, or levels of acquisition (e.g., Jee et al., 2023).
          Longitudinal studies compared a sample of CHL learners over time to trace their changes
          (e.g., He, 2016). Experimental studies often included control groups, comparing a
          representative sample of CHL learners with native speakers, dialect-heritage speakers
          (e.g., Cantonese), or English-L1 baseline groups. Case studies presented deep analyses of
          the profiles and experiences of CHL learners, families, or teachers (e.g., Liang &amp;
          Shin, 2021) and offered in-depth analyses of how identity, culture, and context influenced
          CHL learning outcomes (Li &amp; Shen, 2023).</p>
    <p>Regarding methodological design, 26 out of the 53 studies employed quantitative methods, with
          half being laboratory-based and designing tasks to investigate CHL acquisition (<xref
            ref-type="fig" rid="figure4">Figure 4</xref>). The other half included questionnaire
          surveys and controlled observations conducted in homes, classrooms, or individual
          settings, focusing on CHL acquisition (4 studies) and pedagogy (4 studies) to explore the
          predictive factors of CHL learners’ language proficiency. The predominance of
          quantitative, particularly laboratory-based, research may be attributed to researchers’
          preference for the rigorous testing of hypotheses about language learning in controlled
          settings, offering precise insights into cognitive processes specific to heritage language
          learners.</p>
    <p>In contrast, 23 studies utilized qualitative methods, with 13 focusing on issues related to
          CHL maintenance and policy, 6 on identity topics, and 4 on pedagogy. Specifically, the
          research approaches of these studies included narrative studies and ethnography, employing
          data collection and analysis methods such as interviews with learners, parents, and
          teachers, observations in both homes and classrooms settings, conversation analysis, and
          the analysis of artifacts such as textbooks and other cultural materials used in CHL
          educational contexts. In addition, four studies adopted mixed methods—two on CHL
          maintenance and policy, and two on identity issues. The use of qualitative and mixed
          methods in CHL research provided detailed insights into language maintenance practices,
          identity formation, and effective teaching strategies by capturing contextual and
          experiential data that complements the quantitative findings from other studies.</p>
    <fig id="figure4">
      <caption><p>Figure 4. Methods used in the reviewed studies</p></caption>
      <graphic mimetype="image" mime-subtype="x-emf" xlink:href="media/image4.jpeg" />
    </fig>
  </sec>
  <sec id="research-topics-of-studies-on-chl-education">
    <title>3.2. Research topics of studies on CHL education</title>
    <p>Overall, the studies on CHL education could be categorized into four areas: (1) CHL
          maintenance (19 studies), (2) CHL acquisition (15 studies), (3) CHL pedagogy (10 studies),
          and (4) CHL learners’ ethnic identity (9 studies). The numbers of these types of CHL
          education studies have increased steadily over recent years (see <xref ref-type="fig" rid="figure5">Figure 5</xref>), with a growing
          emphasis on CHL maintenance and learners’ identity from a sociocultural perspective rather
          than solely a cognitive one. The reviewed studies have reported and explained the
          challenges encountered in CHL proficiency development by learners, parents, and educators,
          as well as their coping strategies. Two contributing factors to learning outcomes were
          also examined in the studies, including individual efforts and contextual input from
          homes, classrooms, and wider communities. Researchers have also focused on how CHL
          learners (re)construct their ethnic identity within multilingual and multicultural
          societies.</p>
    <fig id="figure5">
      <caption><p>Figure 5. Trends in the reviewed studies under each topic</p></caption>
      <graphic mimetype="image" mime-subtype="jpeg" xlink:href="media/image5.jpeg" />
    </fig>
    <sec id="chl-maintenance-19-studies">
      <title>3.2.1. CHL maintenance (19 studies)</title>
      <p>HL maintenance is understood as the continuing use of a minority language in the face of
            challenges from a regionally or socially more powerful language (Mesthrie &amp; Leap,
            2000; Schalley &amp; Eisenchlas, 2020). The studies on this topic consistently argued
            that CHL maintenance is both a necessary ethnic asset for communication within families,
            and a practical skill set for educational and career opportunities. The existing
            literature has extensively explored the complex processes and outcomes of CHL
            maintenance, highlighting a wide range of contributing factors such as the individual
            investment of CHL learners (Li, G. et al., 2021), parental involvement (Chen et al.,
            2023), parents’ and children’s ideologies related to CHL (Zhang &amp; SlaughterDefoe,
            2009), HL classroom practice (Wu &amp; Leung, 2022), and practical benefits from the
            broader sociocultural context (Mu, 2014), and so on. These factors collectively
            contributed to the diverse outcomes observed in CHL learners’ multilingual
            development.</p>
      <p>To effectively navigate CHL maintenance, related stakeholders, including learners, parents,
            and educators, have made significant efforts and enacted diverse practices that have
            attracted scholarly attention. For example, Mu and Dooley (2015) and Zhang and
            Slaughter-Defoe (2009) reported various forms of family support for CHL maintenance,
            such as verbal encouragement and instruction. They noted that families tended to use
            both informal instruction (e.g., error correction, parent-child talk, language practices
            like watching Chinese TV and mealtime conversations) and formal instruction (e.g.,
            assigning additional Chinese homework, using Chinese books from China, attending Chinese
            schools, engaging home tutors). They also found that family encouragement and structured
            learning activities played a crucial role in fostering a sense of pride and connection
            among CHL learners.</p>
      <p>In addition, Chen et al. (2021) reported that the effectiveness of home efforts was
            mediated by family socioeconomic status (SES), whereby higher SES was generally
            associated with reduced emphasis on Chinese reading and writing, decreased use of
            Chinese at home, limited exposure to Chinese media, fewer Chinese friendships, and lower
            proficiency in Chinese productive vocabulary. While lower generational status correlated
            with lower HL proficiency, CHL learners’ Chinese literacy and receptive vocabulary
            improved as they matured. However, although parents expected their children to maintain
            the Chinese language, they primarily emphasized conversational skills over literacy
            development, assuming that extensive exposure to Chinese might hinder their English
            development, which they deemed crucial for college preparation. They also anticipated
            that Chinese literacy would be further developed during college, as reported by Chen et
            al. (2023).</p>
      <p>Despite considerable efforts made by parents, CHL children’s
      attitudes often varied, with peer pressure and the urge to conform
      diminishing their motivation to learn Chinese and resulting in
      resistance during childhood, although there was often a renewed
      interest in adolescence. Liang and Shin (2021) found that CHL
      learners preferred communicating in English within ethnic networks
      despite their near-native conversational proficiency in Chinese,
      resulting from pressure to assimilate into the dominant
      society.</p>
      <p>At the same time, children were often passively or agentively engaged in spontaneous
            language brokering and code-switching in addition to formal and informal CHL learning,
            shaping immigrant family discourse. He (2016) reported that CHL children often assisted
            their parents with language, cultural, and technological challenges through language
            brokering, which specifically referred to the translating and interpreting practice of
            bilingual individuals for their family members or others who do not speak the dominant
            language. Wu and Kim (2009) found that Chinese American adolescents’ perceptions of
            brokering were influenced by their Chinese orientation and family expectations.
            Code-switching, or using multiple languages in a single conversation, helps CHL speakers
            to achieve interpersonal goals in multilingual contexts (He, 2013; Gong et al., 2021).
            These practices highlight CHL speakers’ ability to blend linguistic resources, enhancing
            their identity flexibility and cultural affiliation.</p>
      <p>Beyond individual and interpersonal practices within the close personal relationships of
            CHL learners (i.e., in family and school contexts), co-ethnic networks, especially
            extended family support, also played crucial roles in CHL maintenance as well as being
            mediated by media use. For example, Zhang (2012) reported that the language maintenance
            of CHL learners from immigrant families was shaped by co-ethnic networking among their
            family members in both China and their country of residence. Throughout the process,
            polymedia and digital platforms (e.g., WeChat) significantly impacted CHL maintenance in
            immigrant families by offering diverse resources and enabling interactions, although
            challenges such as children’s preferences and parental supervision persisted, as
            reported by Wang and Hamid (2022) and Zhao and Hewitt (2020). Wang and Hamid (2022)
            examined the role of polymedia in enhancing CHL development and maintaining family
            communication across significant geographical distances. Parents valued polymedia for
            providing diverse CHL-related practices and fostering ethnic identity, but they were
            concerned about excessive use and the challenges of navigating polymedia effectively,
            especially caused by children’s preference for Englishmediated and
            entertainment-oriented (rather than educational) media. At the same time, CHL children
            agentively and creatively navigated communication using various semiotic resources such
            as written Chinese, English, audio recordings, emojis, stickers, and digital artifacts,
            as reported by Zhao and Hewitt (2020). This study highlighted that digital platforms
            like WeChat facilitated meaningful language and literacy development through dynamic,
            engaging interactions by extending CHL learner’s Chinese-speaking social worlds and
            providing contextualized HL practice.</p>
      <p>The 19 studies on CHL maintenance reveal a complex landscape, where the efforts of parents,
            children, teachers, and contextual factors intertwine to shape CHL maintenance and
            policy, impacting CHL proficiency and heritage cultural connection. Overall, relevant
            research findings have demonstrated that significant challenges persist despite the
            well-documented crucial role of family and language schools in preserving CHL. The
            contribution of parents’ efforts and engagement in CHL maintenance are often hindered by
            children’s attitudes and the dominant language environment. Interpersonal support from
            co-ethnic networks and extended family is vital, but managing these influences alongside
            assimilation pressures is a sophisticated process. Contextually, factors such as SES,
            family language use, and media engagement critically shape CHL development. Although
            digital platforms provide diverse resources, they also present challenges related to
            children’s preferences and parental supervision. While a substantial portion of the
            existing research has concentrated on examining individual and familial practices (e.g.,
            home language use and parental involvement) in CHL maintenance, it has often failed to
            explore how these practices interact with broader socio-political factors, such as
            language policy, education policy, access to bilingual educational resources, and racial
            social justice.</p>
    </sec>
    <sec id="chl-acquisition-15-studies">
      <title>3.2.2. CHL acquisition (15 studies)</title>
      <p>Among the 53 studies reviewed, 15 provide insights into the acquisition of CHL across
            different dimensions, including vocabulary knowledge development, literacy abilities,
            and grammar acquisition (e.g., Li, F. et al., 2021; Mai &amp; Deng, 2019). Research in
            these domains has highlighted the multifaceted nature of CHL acquisition, emphasizing
            the importance of vocabulary knowledge, print-related activities, and early language
            exposure in literacy and grammar development.</p>
      <p>The predominant focus of these studies lay in investigating CHL learners’ vocabulary
            acquisition, exploring various factors such as morphological awareness, oral language
            exposure, learning strategies, and family language environment. For example, Luo et al.
            (2018) found that morphological awareness contributed to Chinese vocabulary learning,
            but no clear positive correlation was observed with phonological knowledge. Similarly,
            the study by Zhang et al. (2022) indicated that in addition to morpheme recognition and
            definitional knowledge, structural recognition also contributed to Chinese lexical
            inference. As well as highlighting the morphological awareness in vocabulary learning,
            studies have also examined the effect of language input (i.e., oral and print language)
            on vocabulary acquisition among CHL learners. For instance, Zhang (2016) demonstrated
            that oral language input at home and print exposure at CHL schools jointly enhanced
            word-level abilities, such as vocabulary knowledge and lexical inferring ability. In
            addition, Zhang and Koda (2018a) suggested that early exposure to spoken Chinese
            enhanced the development of oral vocabulary knowledge and morphological awareness in CHL
            learners, thereby strengthening the connection between oral and print vocabulary
            knowledge. Previous studies have also recognized the influence of learning strategies
            and home language environment on CHL vocabulary acquisition; family SES was found by Li.
            G. et al. (2021) to be a significant factor affecting early HL vocabulary development.
            In addition, the quality of home language environments has been shown to shape early
            vocabulary development, although the duration of attending HL schools showed only a
            limited association with lexical knowledge.</p>
      <p>Research on CHL learners’ literacy development (e.g., reading comprehension) also
            highlighted the crucial role of vocabulary knowledge, morphological awareness, and
            print-related activities in reading comprehension, while oral language exposure was
            found to contribute less directly to higher-level reading skills. For instance, Zhang
            and Koda (2018b) investigated the role of vocabulary knowledge and morphological
            awareness in reading comprehension, finding that vocabulary knowledge (i.e.,
            word-meaning knowledge) directly and indirectly influenced reading comprehension. They
            emphasized that morphological awareness was helpful in connecting vocabulary knowledge
            to reading comprehension. Zhang (2016) explored how early language input impacted later
            reading development, finding that while oral language exposure enhanced oral language
            capacity, it did not directly improve higher-level reading abilities (e.g., lexical
            inferring and reading comprehension). In contrast, print-related activities at home, for
            example, practicing Chinese characters and reading Chinese storybooks, significantly
            facilitated reading comprehension.</p>
      <p>Zhang and Koda (2021a) further explored the relationship between oral language and reading
            capabilities, finding significant correlations between oral language capacity,
            morphological awareness, and print vocabulary, but no direct impact on higher-level
            inferring and comprehension. In addition, Zhang and Koda (2011) found a positive
            correlation between parents’ use of Chinese, their assistance with homework, and
            children’s vocabulary breadth, with a particular relationship between independent
            schoolwork reading, radical identification ability, and vocabulary breadth. Overall,
            these findings underscored the intricate relationship between various linguistic
            awareness, knowledge, and activities in shaping reading comprehension skills among CHL
            learners, highlighting the need for a multifaceted approach to literacy development.</p>
      <p>Despite these insights, the existing research reveals gaps in our understanding of how
            various factors interact to affect reading comprehension. Future research should explore
            how different types of print-related activities and parental engagement specifically
            influence higher-level reading skills, while longitudinal studies could provide a deeper
            understanding of how early literacy experiences shape long-term reading development.
            Moreover, investigating the interplay between oral language exposure and print-based
            strategies may reveal more effective approaches to fostering comprehensive literacy
            skills in CHL learners.</p>
      <p>Grammar represents a critical linguistic aspect in the acquisition of CHL, alongside
            Chinese vocabulary and reading skills, and it has attracted considerable scholarly
            interest. Research on CHL grammar has highlighted the importance of early language
            exposure and the resilience of HL proficiency, with current theories such as the
            Interface Hypothesis showing limitations in predicting bilingual grammar acquisition
            (Jin et al., 2022). Mai and Deng (2019) quantitatively investigated the proficiency and
            grammatical representation of the <italic>shì…de</italic> cleft structure in CHL
            learners, revealing that while its temporal feature is relatively stable, lexical and
            discourse aspects are more susceptible to variability. This suggests that early Chinese
            exposure plays a key role in shaping proficiency, with minimal English transfer effects.
            Jin and colleagues (2022) examined the comprehension and production of Mandarin relative
            clauses, finding that despite initial production challenges, CHL learners could fully
            acquire complex structures with sustained HL exposure. This study also indicated that
            cross-linguistic influence from English did not lead to incomplete acquisition,
            emphasizing the resilience of HL proficiency.</p>
      <p>While current research has highlighted the resilience of HL proficiency and the importance
            of early language exposure, it also underscores the limitations of existing theoretical
            frameworks such as the Interface Hypothesis in fully explaining bilingual grammar
            acquisition. Future research needs to focus on longitudinal studies to better understand
            the dynamic processes of grammatical development in CHL learners. At the same time, more
            nuanced investigations into the interaction between crosslinguistic influences and
            grammatical structures are needed, along with studies exploring how different types of
            language exposure and instructional methods impact long-term proficiency.</p>
    </sec>
    <sec id="chl-pedagogy-10-studies">
      <title>3.2.3. CHL pedagogy (10 studies)</title>
      <p>Studies on effective CHL pedagogy encompass a range of practices, including classroom
            teaching strategies, the use of textbooks, and curriculum development tailored to CHL
            learners. These studies mainly examine teaching practices that foster literacy,
            vocabulary acquisition, and reading comprehension while integrating modern educational
            tools and technology. They also explore the role of textbooks and curriculum development
            in shaping CHL educational experiences and outcomes. The relevant findings highlight the
            importance of innovative teaching methods and curriculum enhancements in supporting CHL
            learners’ language development and cultural understanding.</p>
      <p>Previous studies (e.g., Lan, 2014; Zhou, 2022) have shown that effective classroom teaching
            practices in CHL education are crucial for enhancing literacy, vocabulary, and reading
            comprehension, as well as indicating the importance of integrating modern technology to
            support language learning. Previous studies highlighted diverse strategies that
            addressed these areas, demonstrating the impact of innovative pedagogical approaches on
            student outcomes. Cun (2023) and Cheng et al. (2023) focused on enhancing literacy and
            reading comprehension through innovative approaches. Cun (2023) highlighted the
            effectiveness of arts-based writing activities, where teachers took on a supportive role
            to boost student engagement and meaning-making, while Cheng et al. (2023) introduced the
            Progressive Character Reading method, which improved character acquisition and reading
            comprehension by providing frequent exposure to characters, thereby strengthening
            students’ orthographic, phonological, and semantic knowledge.</p>
      <p>Han and Chen (2010) further contributed to this area by demonstrating that repeated reading
            strategies enhanced word recognition and a deeper understanding of language content. In
            contrast, both Zhou (2022) and Jia (2009) examined more effective teaching approaches
            beyond rote memorization. Zhou’s (2022) study on teaching Chinese classifiers found that
            cognitive teaching methods were more successful than traditional rote memorization in
            facilitating understanding of complex linguistic structures, and Jia (2009) compared
            student-centered interactive learning with teacher-centered memorization, highlighting
            the benefits of interactive methods in promoting cultural transmission and literacy
            development. In addition, Lan (2014) demonstrated that technology, specifically
            immersive virtual environments, could improve CHL learners’ oral performance and
            attitudes towards Mandarin, underscoring the growing importance of integrating modern
            technology into educational practices to foster engagement and to enhance language
            learning outcomes.</p>
      <p>At the same time, teachers were being confronted with the sociolinguistic challenges of CHL
            maintenance posed by the public emphasis on Mandarin over other dialects, as Wu and
            Leung (2022) notably pointed out in their study on Hoisan-heritage Chinese Americans.
            They also reported that CHL teachers used translanguaging pedagogy to allow students to
            share their diverse linguistic knowledge and ameliorate the risks of a Mandarin-only
            approach, fostering critical language awareness and encouraging competence in various
            Chinese languages. This study emphasized the need for CHL education to consider
            different Chinese languages, not just Mandarin.</p>
      <p>While these studies have consistently illustrated the effectiveness of diverse teaching
            strategies and technological integration in advancing CHL education, future research
            should explore how these strategies can be tailored to diverse learning contexts and
            individual needs, as well as the long-term impact of these pedagogical strategies on
            language proficiency and cultural competence. Further studies should also investigate
            the interplay between technology and traditional teaching methods to optimize their
            combined effects on particular CHL acquisition.</p>
      <p>Other studies on CHL pedagogy explored issues such as the use of textbooks and curriculum
            development. Curdt-Christiansen (2008) examined the textbooks used in CHL classrooms,
            revealing that teachers employ discourse devices and historical contexts, which
            constituted literacy education, to cultivate cultural identity and values among CHL
            children. This study demonstrated how these educational texts, alongside other
            sociocultural resources, can play a role in shaping students’ moral identities and
            cultural capital, and also highlights how textbooks can contribute to students’
            interpretation of social events and their ability to navigate their social worlds.</p>
      <p>The exploration of curriculum development in CHL education has revealed crucial insights
            into the roles of various stakeholders and structural challenges within language
            programs, including parental involvement (Li, 2005), institutional tracking (Tian,
            2017), and program resources (Luo et al., 2018). Li (2005) examined the role of parents
            in CHL schools, revealing that while parental support is beneficial, an over-reliance on
            parents can lead to issues such as low teaching quality and inadequately prepared
            instructors. This study emphasizes the need to diversify resources by fostering
            connections with Chinese international students, scholars, and faculty to enhance the
            overall quality of these programs. Tian (2017) analyzed the impact of tracking systems
            in an Ivy League Chinese language program, indicating that despite their cultural and
            linguistic advantages, CHL learners were placed in lower proficiency tracks compared to
            non-heritage learners. This analysis highlights how institutional tracking and cultural
            processes can contribute to the achievement gap between heritage and non-heritage
            learners, stressing the importance of reconsidering structural and cultural factors in
            improving CHL learners’ language proficiency. Luo et al. (2018) conducted a national
            survey of college-level Chinese language programs in the USA, providing a comprehensive
            overview of CHL education. Their survey, which included responses from 246 institutions,
            revealed a broad spectrum of program structures, teaching materials, and pedagogical
            challenges. The study identified key issues such as the need for updated teaching
            resources and professional development for instructors, emphasizing the need for
            systemic improvements to address these challenges and better support CHL learners.</p>
      <p>Studies on CHL pedagogy highlight progress in literacy, vocabulary acquisition, and reading
            comprehension through innovative teaching practices and curriculum enhancements. While
            modern strategies and technology integration demonstrate potential in improving
            education effectiveness and quality, there is still a need to tailor these approaches to
            diverse learning contexts and individual needs. The role of textbooks and curriculum
            development in fostering cultural identity underscores the necessity for ongoing
            refinement. Future research should focus on how pedagogical strategies impact long-term
            language proficiency and cultural competence, adapt practices to varying educational
            settings, and evaluate the interplay between technology and traditional methods. At the
            same time, addressing structural challenges and resource needs in CHL programs will be
            essential for developing more effective and inclusive educational practices.</p>
    </sec>
    <sec id="chl-learners-ethnic-identity-9-studies">
      <title>3.2.4. CHL learners’ ethnic identity (9 studies)</title>
      <p>Nine of the 53 identified empirical studies focused on CHL learners’ ethnic identity,
            defined as an individual’s understanding of their membership in a non-state-dominating
            group and the significance they attach to this belonging (Yang Y., 2023). The study of
            CHL learners’ ethnic identity is crucial for understanding their cultural adaptation
            within multilingual and multicultural societies. It can shed light on the complex
            entanglement between language, culture, and identity formation, supporting Ruzaa’s
            (2000, p. 168) assertion that “languages are among the most powerful symbols of ethnic
            identity.”</p>
      <p>It is commonly assumed that ability and use of a heritage language are key factors related
            to ethnic identity construction (Noro, 2009). Because of CHL learners’ diverse
            backgrounds, the ways they view themselves in relation to their languages and heritage
            communities vary considerably, with some readily adopting a dual linguistic and cultural
            identity and others feeling more reluctant to do so. Hence, the heterogeneity in CHL
            learners’ identities and the associated social, cultural, and historical ramifications
            have received increasing attention from scholars. These authors generally argue that it
            is essential to comprehend how young people express their racial and ethnic identities,
            language use, literacy, and cultural traditions in both conventional and evolving ways,
            and also to avoid the assumption of unidirectional correspondences between race,
            ethnicity, language, and cultural ways of being.</p>
      <p>Researchers have reported that CHL learners’ ethnic identity may be shaped by essentialist
            discourses of Chineseness and their own agency (e.g., Comanaru &amp; Noels, 2009; Zhou
            &amp; Liu, 2023). These essentialist discourses, which are based on the assumption that
            all members of a particular identity category shared fixed attributes that define their
            identity (Bucholtz &amp; Hall, 2004), can either constrain or enhance CHL learners’
            ethnic identity, and they often impose rigid definitions and stereotypes about ethnic
            groups, which can impact how learners perceive and express their own ethnic identity in
            relation to their heritage language learning. For instance, Zhou and Liu (2023) found
            that CHL learners were often disempowered by the model minority stereotype imposed by
            their parents and the dominant society, but their bilingual skills, which facilitated
            their workplace experiences, provided a space for them to gain confidence in their
            bilingual and hybrid identities. Similarly, Paciocco (2018) observed that the
            exclusionist discourse in Italy led CHL children with limited Italian literacy to adopt
            a diasporic stance as a coping strategy. In terms of the tensions between Chinese ethnic
            identity and the dominant society where learners reside, Wu et al. (2014) further noted
            that the mismatch between the Chinese dialect spoken at home and the standardized
            Mandarin used as the institutional norm in language classrooms posed challenges for CHL
            learners’ language learning investment and ethnic identity.</p>
      <p>While being socially impacted by essentialist discourses, CHL learners’ agency and
            strategies to (re)position themselves in learning Chinese also significantly influence
            their ethnic identity. For example, Comanaru and Noels (2009) and Yang, Y. (2023) found
            that agentive CHL learners who perceived their Chinese heritage as integral to their
            self-concept, rather than strongly preferring the dominant language Mandarin, exhibited
            greater motivation, engagement, and enjoyment in learning Chinese, which in turn
            reinforced their Chinese ethnic identity. In contrast, limited agency among CHL learners
            could negatively impact their identity development. For example, Yang, C. T. (2023)
            reported that CHL learners who were strongly connected with English perceived Mandarin
            as a secondary language rather than a heritage language, and this lack of agency
            resulted in rejection and resistance to learning Mandarin due to their identity
            connections to their country of residence (i.e., American identity).</p>
      <p>In addition, Tong and Tsung (2023) highlighted that CHL learners with higher agency who
            employed proactive strategies, such as intense engagement with Chinese language and
            culture, strong motivation to overcome learning challenges, and reflective integration
            of Chinese language development with their whole personal growth, were able to foster a
            nuanced and reinforced ethnic identity. Conversely, those who embraced the advantages of
            their foreigner identity when visiting China, adopting an outsider stance and engaging
            only superficially with Chinese language and culture, failed to actively explore their
            heritage language identities, leading to minimal development of their Chinese ethnic
            identity (Tong &amp; Tsung, 2023). In this regard, the ethnic identity dynamics of CHL
            learners involve navigating essentialist discourses, with outcomes ranging from feeling
            disempowered by stereotypes to reclaiming and transforming their identities through
            strategic repositioning, gaining confidence, and actively participating in heritage
            language learning.</p>
      <p>Existing research underscores that the interplay between essentialist discourses and
            individual agency has emerged as a critical aspect shaping these identities, and
            highlights the significance of CHL learners’ ethnic identity in their cultural
            adaptation and language learning. Essentialist views of Chineseness could both constrain
            and empower learners, depending on how they navigate these discourses. The contrast
            between learners who actively engage with their heritage language and those who adopt an
            outsider perspective highlights the pivotal role of agency in identity formation.
            However, an over-reliance on essentialist frameworks risks oversimplifying the
            complexities of identity, potentially neglecting other sociocultural factors—for
            example, duration of residence in the adopted country, family socioeconomic status,
            education experience, and local sociopolitical context—that may act to shape identity.
            Future research should aim to move beyond these binaries and extend the focus to
            intersectionalities between identity and other factors—for instance, media use in family
            and school—and embrace the full diversity of experience among CHL learners.</p>
    </sec>
  </sec>
</sec>
<sec id="conclusions-and-the-way-forward">
  <title>4. Conclusions and the way forward</title>
  <p>This systematic review of 53 empirical studies aimed to examine the landscape of research on
        CHL education from 2008 to 2023, focusing on learners’ and teachers’ identities, maintenance
        and policy issues, acquisition processes, and pedagogical practices. Studies on CHL
        learners’ ethnic identity have underscored the significant interplay between language and
        identity, pointing to the need for more context-specific research Gong et al. (2021).
        Insights into how ethnicity, gender, and socioeconomic status influence identity formation,
        as well as the necessity of including various Chinese dialects, are crucial. Similarly, the
        examination of CHL maintenance and policy across individual, interpersonal, and contextual
        levels illustrates the complexity of maintaining heritage languages amid assimilation
        pressures and varying contextual factors. Research on CHL acquisition has emphasized the
        importance of vocabulary development, literacy, and grammar, but gaps remain in
        understanding the interactions between these factors and their long-term impacts.
        Pedagogical studies have highlighted the effectiveness of modern teaching strategies and
        technology integration, but call for further adaptation to diverse educational contexts and
        needs.</p>
  <p>While the reviewed studies have provided valuable insights into CHL education, several critical
        areas warrant further exploration in terms of both research topics and methodologies.
        Thematically, first, studies are needed to examine how CHL learners’ ethnic identity is
        constructed in multilayered contexts, factoring in ethnicity, gender, and socio-economic
        status, and non-Mandarin Chinese dialect backgrounds. Second, investigations can be improved
        by extending to additional contextual factors such as changes in educational policy,
        community support networks, and access to bilingual resources, all of which may
        significantly influence CHL maintenance and development.</p>
  <p>Methodologically, first, there is a pressing call for research that develops and tests tailored
        interventions to address the specific challenges faced by different family members while
        balancing the benefits of CHL maintenance with assimilation pressures. Second,
        classroom-based action research conducted by teacher researchers has the potential to
        enhance both CHL pedagogy development and the professional development of CHL teachers, to
        mitigate their perception of teaching Chinese as a “secondary” vocation (Wu et al., 2011).
        Also in this area, it will be beneficial to understand how to effectively combine modern
        educational tools with traditional methods to enhance CHL learning outcomes. Third,
        evaluating the long-term effects of innovative teaching strategies and curriculum
        developments will be essential. Fourth, considering the development of immigrant
        generations, it is becoming increasingly important to conduct research on language and
        culture transmission among third-generation Chinese immigrants and beyond, since changes in
        the linguistic and cultural profiles of their parents and societal environments are likely
        to significantly impact their heritage language experiences (Visonà &amp; Plonsky, 2020).
        Finally, how CHL learners and other stakeholders negotiate the process of learning and
        teaching CHL should be investigated using a bottom-up approach in order to capture their
        experience.</p>
  <p>At the same time, we also offer some practical suggestions for related stakeholders in teaching
        and learning CHL. First, parents play a vital role in CHL maintenance, and they should be
        actively involved in their children’s language learning journey. Practical actions should
        include creating a home environment rich in Chinese linguistic input, such as regular family
        conversations in Chinese, reading Chinese books, and participating in cultural activities.
        It is also important that parents collaborate with schools to reinforce learning goals, and
        balance the maintenance of Chinese with the overall development of their children in the
        dominant society. Second, teachers are encouraged to differentiate their instruction based
        on learners’ linguistic backgrounds, incorporate culturally relevant materials, involve
        families in the learning process, and leverage technology to enhance engagement and
        bilingualism, while fostering a positive cultural identity in CHL learners Gong &amp; Gao
        (2024). Third, educational institutions should foster closer collaboration among teachers,
        parents, and communities to provide holistic support for CHL learners. This could include
        organizing workshops, sharing resources, and building community networks that encourage the
        use of Chinese both in and outside of the classroom, so that the quality of CHL learning and
        teaching can be improved. This will ultimately benefit many Chinese immigrant families.</p>
</sec>
</body>
<back>
  
  <app-group>
    <title>CREdiT author statement</title>
    <p>Huichao (Claire) Zhang: Writing – original draft, Resources, Formal analysis
      Yang (Frank) Gong: Conceptualization, Writing – review &amp; editing, Supervision, Formal analysis, Funding acquisition
      Luyao (Elva) Zhang: Resources, Formal analysis.
      Xuesong (Andy) Gao: Conceptualization, Writing – review &amp; editing.
      This work was supported by University of Macau, Macau SAR, China
      [grant number: MYRG-GRG2024-00153-FED].</p>
  </app-group>
  
  <ref-list>
    <ref id="ref1">
      <element-citation publication-type="webpage">
        <person-group person-group-type="author">
          <name>
            <surname>Australian Bureau of Statistics</surname>
          </name>
        </person-group>
        <year>2018</year>
        <source>Census All Persons QuickStats</source>
        <uri>https://www.abs.gov.au/census/find-census-data/quickstats/2016/0#cultural</uri>
      </element-citation>
    </ref>
    <ref id="ref2">
      <element-citation publication-type="book">
        <person-group person-group-type="author">
          <name>
            <surname>Booth</surname>
            <given-names>Andrew</given-names>
          </name>
          <name>
            <surname>Martyn-St James</surname>
            <given-names>Marrissa</given-names>
          </name>
          <name>
            <surname>Clowes</surname>
            <given-names>Mark</given-names>
          </name>
          <name>
            <surname>Sutton</surname>
            <given-names>Anthea</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <source>Systematic Approaches to a Successful Literature Review</source>
        <publisher-name>London: Sage</publisher-name>
        <uri>https://www.torrossa.com/it/resources/an/5282271</uri>
      </element-citation>
    </ref>
    <ref id="ref3">
      <element-citation publication-type="chapter">
        <person-group person-group-type="author">
          <name>
            <surname>Bucholtz</surname>
            <given-names>Mary</given-names>
          </name>
          <name>
            <surname>Hall</surname>
            <given-names>Kira</given-names>
          </name>
        </person-group>
        <year>2004</year>
        <source>Language and identity</source>
        <person-group person-group-type="editor">
          <name>
            <surname>Duranti</surname>
            <given-names>Alessandro</given-names>
          </name>
        </person-group>
        <publisher-name>Williston: John Wiley &amp; Sons</publisher-name>
        <comment>pp. 369-394</comment>
        <uri>https://doi.org/10.1002/9780470996522</uri>
      </element-citation>
    </ref>
    <ref id="ref4">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Chen</surname>
            <given-names>Jia</given-names>
          </name>
          <name>
            <surname>Wang</surname>
            <given-names>Lin</given-names>
          </name>
          <name>
            <surname>Kim</surname>
            <given-names>Youngsoon</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <source>International Journal of Multilingualism</source>
        <volume>21</volume>
        <issue>4</issue>
        <fpage>1757</fpage>
        <lpage>1774</lpage>
        <article-title>Challenging journeys for minority language-speaking parents: Teaching heritage language in inter-lingual families</article-title>
        <uri>https://doi.org/10.1080/14790718.2023.2253271</uri>
      </element-citation>
    </ref>
    <ref id="ref5">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Chen</surname>
            <given-names>Lin</given-names>
          </name>
          <name>
            <surname>Wang</surname>
            <given-names>Danping</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <source>Current Issues in Language Planning</source>
        <volume>25</volume>
        <issue>2</issue>
        <fpage>157</fpage>
        <lpage>175</lpage>
        <article-title>Micro language planning in Mandarin-dominated Chinese language education: Voices from dialect-background heritage learners in New Zealand</article-title>
        <uri>https://doi.org/10.1080/14664208.2023.2260634</uri>
      </element-citation>
    </ref>
    <ref id="ref6">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Chen</surname>
            <given-names>Stephen H.</given-names>
          </name>
          <name>
            <surname>Zhou</surname>
            <given-names>Qing</given-names>
          </name>
          <name>
            <surname>Uchikoshi</surname>
            <given-names>Yuuko</given-names>
          </name>
        </person-group>
        <year>2018</year>
        <article-title>Heritage language socialization in Chinese American immigrant families: Prospective links to children’s heritage language proficiency</article-title>
        <source>International Journal of Bilingual Education and Bilingualism</source>
        <volume>24</volume>
        <issue>8</issue>
        <fpage>1193</fpage>
        <lpage>1209</lpage>
        <pub-id pub-id-type="doi">10.1080/13670050.2018.1547680</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref7">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Cheng</surname>
            <given-names>Mengping</given-names>
          </name>
          <name>
            <surname>Everatt</surname>
            <given-names>John</given-names>
          </name>
          <name>
            <surname>Arrow</surname>
            <given-names>Alison</given-names>
          </name>
          <name>
            <surname>Denston</surname>
            <given-names>Amanda</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <article-title>Chinese heritage children learning to read characters: The effects of group reading and frequency of character exposure</article-title>
        <source>Language Teaching Research</source>
        <pub-id pub-id-type="doi">10.1177/13621688231196650</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref8">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Comanaru</surname>
            <given-names>Ruxandra</given-names>
          </name>
          <name>
            <surname>Noels</surname>
            <given-names>Kimberly A.</given-names>
          </name>
        </person-group>
        <year>2009</year>
        <article-title>Self-determination, motivation, and the learning of Chinese as a heritage language</article-title>
        <source>The Canadian Modern Language Review</source>
        <volume>66</volume>
        <issue>1</issue>
        <fpage>131</fpage>
        <lpage>158</lpage>
        <pub-id pub-id-type="doi">10.3138/cmlr.66.1.131</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref9">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Cun</surname>
            <given-names>Aijuan</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <article-title>An arts-based lesson: Chinese heritage children’s multimodal early writing using fallen leaves</article-title>
        <source>Early Childhood Education Journal</source>
        <volume>52</volume>
        <issue>6</issue>
        <fpage>1149</fpage>
        <lpage>1164</lpage>
        <pub-id pub-id-type="doi">10.1007/s10643-023-01504-9</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref10">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Curdt-Christiansen</surname>
            <given-names>Xiao Lan</given-names>
          </name>
        </person-group>
        <year>2008</year>
        <article-title>Reading the world through words: Cultural themes in heritage Chinese language textbooks</article-title>
        <source>Language and Education</source>
        <volume>22</volume>
        <issue>2</issue>
        <fpage>95</fpage>
        <lpage>113</lpage>
        <pub-id pub-id-type="doi">10.2167/le721.0</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref11">
      <element-citation publication-type="chapter">
        <person-group person-group-type="author">
          <name>
            <surname>Duff</surname>
            <given-names>Patricia</given-names>
          </name>
          <name>
            <surname>Doherty</surname>
            <given-names>Liam</given-names>
          </name>
        </person-group>
        <year>2019</year>
        <chapter-title>Learning “Chinese” as a heritage language: Challenges, issues and ways forward</chapter-title>
        <source>The Routledge handbook of Chinese applied linguistics</source>
        <fpage>149</fpage>
        <lpage>164</lpage>
        <publisher-name>Routledge</publisher-name>
        <publisher-loc>London</publisher-loc>
        <pub-id pub-id-type="doi">10.4324/9781315625157</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref12">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Evans</surname>
            <given-names>Jennifer</given-names>
          </name>
          <name>
            <surname>Benefield</surname>
            <given-names>Pauline</given-names>
          </name>
        </person-group>
        <year>2001</year>
        <article-title>Systematic reviews of educational research: Does the medical model fit?</article-title>
        <source>British Educational Research Journal</source>
        <volume>27</volume>
        <issue>5</issue>
        <fpage>527</fpage>
        <lpage>541</lpage>
        <pub-id pub-id-type="doi">10.1080/01411920120095717</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref13">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Francis</surname>
            <given-names>Becky</given-names>
          </name>
          <name>
            <surname>Archer</surname>
            <given-names>Louise</given-names>
          </name>
          <name>
            <surname>Mau</surname>
            <given-names>Ada</given-names>
          </name>
        </person-group>
        <year>2009</year>
        <article-title>Language as capital, or language as identity? Chinese complementary school pupils’ perspectives on the purposes and benefits of complementary schools</article-title>
        <source>British Educational Research Journal</source>
        <volume>35</volume>
        <issue>4</issue>
        <fpage>519</fpage>
        <lpage>538</lpage>
        <pub-id pub-id-type="doi">10.1080/01411920802044586</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref14">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Gong</surname>
            <given-names>Y.</given-names>
          </name>
          <name>
            <surname>Lyu</surname>
            <given-names>B.</given-names>
          </name>
          <name>
            <surname>Gao</surname>
            <given-names>X.</given-names>
          </name>
        </person-group>
        <year>2018</year>
        <article-title>Research on teaching Chinese as a second or foreign language in and outside mainland China: A bibliometric analysis</article-title>
        <source>The Asia-Pacific Education Researcher</source>
        <volume>27</volume>
        <issue>4</issue>
        <fpage>277</fpage>
        <lpage>289</lpage>
        <pub-id pub-id-type="doi">10.1007/s40299-018-0385-2</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref15">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Gong</surname>
            <given-names>Yang</given-names>
          </name>
          <name>
            <surname>Gao</surname>
            <given-names>Xuesong</given-names>
          </name>
          <name>
            <surname>Lyu</surname>
            <given-names>Boning</given-names>
          </name>
        </person-group>
        <year>2020</year>
        <article-title>Teaching Chinese as a second or foreign language to non-Chinese learners in mainland China (2014-2018)</article-title>
        <source>Language Teaching</source>
        <volume>53</volume>
        <issue>1</issue>
        <fpage>44</fpage>
        <lpage>62</lpage>
        <pub-id pub-id-type="doi">10.1017/s0261444819000387</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref16">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Gong</surname>
            <given-names>Y.</given-names>
          </name>
          <name>
            <surname>Guo</surname>
            <given-names>Q.</given-names>
          </name>
          <name>
            <surname>Li</surname>
            <given-names>M.</given-names>
          </name>
          <name>
            <surname>Lai</surname>
            <given-names>C.</given-names>
          </name>
          <name>
            <surname>Wang</surname>
            <given-names>C.</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Developing literacy or focusing on interaction: New Zealand students' strategic efforts related to Chinese language learning during study abroad in China</article-title>
        <source>System</source>
        <volume>98</volume>
        <fpage>102462</fpage>
        <pub-id pub-id-type="doi">10.1016/j.system.2021.102462</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref17">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Gong</surname>
            <given-names>Y.</given-names>
          </name>
          <name>
            <surname>Gao</surname>
            <given-names>X.</given-names>
          </name>
        </person-group>
        <year>2024</year>
        <article-title>Language teachers’ identity tensions and professional practice in intercultural teaching</article-title>
        <source>Language Teaching Research</source>
        <pub-id pub-id-type="doi">10.1177/13621688241241125</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref18">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Guo</surname>
            <given-names>Shujian</given-names>
          </name>
          <name>
            <surname>Shen</surname>
            <given-names>Qi</given-names>
          </name>
        </person-group>
        <year>2019</year>
        <article-title>A comparative study of language planning in specific domains in Chinese and international journals (2002-2017)</article-title>
        <source>Círculo de Lingüística Aplicada a La Comunicación</source>
        <volume>79</volume>
        <fpage>3</fpage>
        <lpage>20</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.5209/clac.65645</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref19">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Han</surname>
            <given-names>Zhaohong</given-names>
          </name>
          <name>
            <surname>Chen</surname>
            <given-names>Cheng-ling Alice</given-names>
          </name>
        </person-group>
        <year>2010</year>
        <article-title>Repeated-reading-based instructional strategy and vocabulary acquisition: A case study of a heritage speaker of Chinese</article-title>
        <source>Reading in a Foreign Language</source>
        <volume>22</volume>
        <issue>2</issue>
        <fpage>242</fpage>
        <lpage>262</lpage>
        <pub-id pub-id-type="doi">http://hdl.handle.net/10125/66838</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref20">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>He</surname>
            <given-names>Agnes Weiyun</given-names>
          </name>
        </person-group>
        <year>2013</year>
        <article-title>The wor(l)d is a collage: Multi-performance by Chinese heritage language speakers</article-title>
        <source>The Modern Language Journal</source>
        <volume>97</volume>
        <issue>2</issue>
        <fpage>304</fpage>
        <lpage>317</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.1111/j.1540-4781.2013.12003.x</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref21">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>He</surname>
            <given-names>Agnes Weiyun</given-names>
          </name>
        </person-group>
        <year>2006</year>
        <article-title>Toward an identity theory of the development of Chinese as a heritage language</article-title>
        <source>Heritage Language Journal</source>
        <volume>4</volume>
        <issue>1</issue>
        <fpage>1</fpage>
        <lpage>28</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.46538/hlj.4.1.1</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref22">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>He</surname>
            <given-names>Agnes Weiyun</given-names>
          </name>
        </person-group>
        <year>2016</year>
        <article-title>Discursive roles and responsibilities: A study of interactions in Chinese immigrant households</article-title>
        <source>Journal of Multilingual and Multicultural Development</source>
        <volume>37</volume>
        <issue>7</issue>
        <fpage>667</fpage>
        <lpage>679</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.1080/01434632.2015.1127930</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref23">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Hong</surname>
            <given-names>Jon-Chao</given-names>
          </name>
          <name>
            <surname>Hwang</surname>
            <given-names>Ming-Yueh</given-names>
          </name>
          <name>
            <surname>Tai</surname>
            <given-names>Kai-Hsin</given-names>
          </name>
          <name>
            <surname>Lin</surname>
            <given-names>Pei-Hsin</given-names>
          </name>
        </person-group>
        <year>2017</year>
        <article-title>Intrinsic motivation of Chinese learning in predicting online learning self-efficacy and flow experience relevant to students’ learning progress</article-title>
        <source>Computer Assisted Language Learning</source>
        <volume>30</volume>
        <issue>6</issue>
        <fpage>552</fpage>
        <lpage>574</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.1080/09588221.2017.1329215</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref24">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Hsu</surname>
            <given-names>Hsiu-Pei</given-names>
          </name>
          <name>
            <surname>Pang</surname>
            <given-names>Ching Lin</given-names>
          </name>
          <name>
            <surname>Haagdorens</surname>
            <given-names>Wim</given-names>
          </name>
        </person-group>
        <year>2012</year>
        <article-title>Writing as cultural practice: Case study of a Chinese heritage school in Belgium</article-title>
        <source>Procedia—Social and Behavioral Sciences</source>
        <volume>47</volume>
        <fpage>1592</fpage>
        <lpage>1596</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.1016/j.sbspro.2012.06.868</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref25">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Jee</surname>
            <given-names>Min Jung</given-names>
          </name>
          <name>
            <surname>Park</surname>
            <given-names>Mi Yung</given-names>
          </name>
          <name>
            <surname>Cheon</surname>
            <given-names>Sang Yee</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <article-title>Language maintenance and ethnic identity among Korean heritage speakers in the Pacific region (Australia, New Zealand, and Hawaii)</article-title>
        <source>Journal of Multilingual and Multicultural Development</source>
        <volume>45</volume>
        <issue>10</issue>
        <fpage>4364</fpage>
        <lpage>4383</lpage>
        <pub-id pub-id-type="doi">https://doi.org/10.1080/01434632.2023.2170386</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref26">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Jia</surname>
            <given-names>Li</given-names>
          </name>
        </person-group>
        <year>2009</year>
        <article-title>Contrasting models in literacy practice among heritage language learners of Mandarin</article-title>
        <source>Journal of Asian Pacific Communication</source>
        <volume>19</volume>
        <issue>1</issue>
        <fpage>56</fpage>
        <lpage>75</lpage>
        <pub-id pub-id-type="doi">10.1075/japc.19.1.04jia</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref27">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Jia</surname>
            <given-names>Ruiting</given-names>
          </name>
          <name>
            <surname>Paradis</surname>
            <given-names>Johanne</given-names>
          </name>
        </person-group>
        <year>2016</year>
        <article-title>The acquisition of relative clauses by Mandarin heritage language children</article-title>
        <source>Linguistic Approaches to Bilingualism</source>
        <volume>10</volume>
        <issue>2</issue>
        <fpage>153</fpage>
        <lpage>183</lpage>
        <pub-id pub-id-type="doi">10.1075/lab.16015.jia</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref28">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Jin</surname>
            <given-names>Jing</given-names>
          </name>
          <name>
            <surname>Ke</surname>
            <given-names>Sihui Echo</given-names>
          </name>
          <name>
            <surname>Lee</surname>
            <given-names>John Chi-Kin</given-names>
          </name>
        </person-group>
        <year>2022</year>
        <article-title>Language interfaces in adult heritage language acquisition: A study on encoding of nominal reference in Mandarin Chinese as a heritage language</article-title>
        <source>Frontiers in Psychology</source>
        <volume>12</volume>
        <fpage>790102</fpage>
        <pub-id pub-id-type="doi">10.3389/fpsyg.2021.790102</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref29">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Lan</surname>
            <given-names>Yu-Ju</given-names>
          </name>
        </person-group>
        <year>2014</year>
        <article-title>Does Second Life improve Mandarin learning by overseas Chinese students?</article-title>
        <source>Language Learning and Technology</source>
        <volume>18</volume>
        <issue>2</issue>
        <fpage>36</fpage>
        <lpage>56</lpage>
        <ext-link ext-link-type="uri" xlink:href="https://www.learntechlib.org/p/154078/"/>
      </element-citation>
    </ref>
    
    <ref id="ref30">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Leung</surname>
            <given-names>Genevieve</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Maybe useful to the future generation but not my own: How “useful” is Mandarin really for contemporary Hoisan-heritage Chinese Americans in the San Francisco Bay Area?</article-title>
        <source>Language &amp; Communication</source>
        <volume>76</volume>
        <fpage>121</fpage>
        <lpage>130</lpage>
        <pub-id pub-id-type="doi">10.1016/j.langcom.2020.11.003</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref31">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Li</surname>
            <given-names>Fei</given-names>
          </name>
          <name>
            <surname>Hong</surname>
            <given-names>Xiangfei</given-names>
          </name>
          <name>
            <surname>He</surname>
            <given-names>Zhaoying</given-names>
          </name>
          <name>
            <surname>Wu</surname>
            <given-names>Sixuan</given-names>
          </name>
          <name>
            <surname>Zhang</surname>
            <given-names>Chenyi</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Investigating heritage language processing: Meaning composition in Chinese classifier-noun phrasal contexts</article-title>
        <source>Frontiers in Psychology</source>
        <volume>12</volume>
        <fpage>782016</fpage>
        <pub-id pub-id-type="doi">10.3389/fpsyg.2021.782016</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref32">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Li</surname>
            <given-names>Guofang</given-names>
          </name>
          <name>
            <surname>Gunderson</surname>
            <given-names>Lee</given-names>
          </name>
          <name>
            <surname>Sun</surname>
            <given-names>Zhuo</given-names>
          </name>
          <name>
            <surname>Lin</surname>
            <given-names>Zhen</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Early Chinese heritage language learning in Canada: A study of Mandarin- and Cantonese-speaking children’s receptive vocabulary attainment</article-title>
        <source>System</source>
        <volume>103</volume>
        <fpage>102636</fpage>
        <pub-id pub-id-type="doi">10.1016/j.system.2021.102636</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref33">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Li</surname>
            <given-names>Mengying</given-names>
          </name>
        </person-group>
        <year>2005</year>
        <article-title>The role of parents in Chinese heritage-language schools</article-title>
        <source>Bilingual Research Journal</source>
        <volume>29</volume>
        <issue>1</issue>
        <fpage>197</fpage>
        <lpage>207</lpage>
        <pub-id pub-id-type="doi">10.1080/15235882.2005.10162831</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref34">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Li</surname>
            <given-names>Xiangyun</given-names>
          </name>
          <name>
            <surname>Shen</surname>
            <given-names>Qi</given-names>
          </name>
        </person-group>
        <year>2023</year>
        <article-title>Individual agency in language-in-education policy: A story of Chinese heritage language schools in multilingual Brussels</article-title>
        <source>Current Issues in Language Planning</source>
        <volume>25</volume>
        <issue>2</issue>
        <fpage>137</fpage>
        <lpage>156</lpage>
        <pub-id pub-id-type="doi">10.1080/14664208.2023.2259154</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref35">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Liang</surname>
            <given-names>Feng</given-names>
          </name>
          <name>
            <surname>Shin</surname>
            <given-names>Dong-Shin</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Heritage language maintenance of Chinese immigrant families: Perceptions, practices, and challenges</article-title>
        <source>Bilingual Research Journal</source>
        <volume>44</volume>
        <issue>1</issue>
        <fpage>23</fpage>
        <lpage>38</lpage>
        <pub-id pub-id-type="doi">10.1080/15235882.2021.1922539</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref36">
      <element-citation publication-type="book">
        <person-group person-group-type="author">
          <name>
            <surname>Lie</surname>
            <given-names>Anita</given-names>
          </name>
        </person-group>
        <year>2018</year>
        <source>Educating Chinese-heritage students in the global-local nexus: Identities, challenges, and opportunities</source>
        <publisher-name>Routledge</publisher-name>
        <publisher-loc>New York</publisher-loc>
        <pub-id pub-id-type="doi">10.4324/9781315394541</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref37">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Liu</surname>
            <given-names>Xiaoming</given-names>
          </name>
        </person-group>
        <year>2021</year>
        <article-title>Making the invisible visible: Young Chinese heritage language learners’ reading process through retrospective miscue analysis</article-title>
        <source>Journal of Early Childhood Literacy</source>
        <volume>24</volume>
        <issue>2</issue>
        <fpage>359</fpage>
        <lpage>396</lpage>
        <pub-id pub-id-type="doi">10.1177/14687984211067633</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref38">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Luo</surname>
            <given-names>Han</given-names>
          </name>
          <name>
            <surname>Li</surname>
            <given-names>Yu</given-names>
          </name>
          <name>
            <surname>Li</surname>
            <given-names>Ming-Ying</given-names>
          </name>
        </person-group>
        <year>2019</year>
        <article-title>Heritage language education in the United States: A national survey of college-level Chinese language programs</article-title>
        <source>Foreign Language Annals</source>
        <volume>52</volume>
        <issue>1</issue>
        <fpage>101</fpage>
        <lpage>120</lpage>
        <pub-id pub-id-type="doi">10.1111/flan.12378</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref39">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Luo</surname>
            <given-names>Yang Cathy</given-names>
          </name>
          <name>
            <surname>Koh</surname>
            <given-names>Poh Wee</given-names>
          </name>
          <name>
            <surname>Deacon</surname>
            <given-names>S. Hélène</given-names>
          </name>
          <name>
            <surname>Chen</surname>
            <given-names>Xi</given-names>
          </name>
        </person-group>
        <year>2018</year>
        <article-title>The roles of metalinguistic skills in Chinese-English biliteracy development</article-title>
        <source>Reading and Writing</source>
        <volume>31</volume>
        <issue>8</issue>
        <fpage>1721</fpage>
        <lpage>1740</lpage>
        <pub-id pub-id-type="doi">10.1007/s11145-017-9778-5</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref40">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Ma</surname>
            <given-names>Xiuli</given-names>
          </name>
          <name>
            <surname>Gong</surname>
            <given-names>Yang</given-names>
          </name>
          <name>
            <surname>Gao</surname>
            <given-names>Xuesong</given-names>
          </name>
          <name>
            <surname>Xiang</surname>
            <given-names>Yiping</given-names>
          </name>
        </person-group>
        <year>2017</year>
        <article-title>The teaching of Chinese as a second or foreign language: A systematic review of the literature 2005-2015</article-title>
        <source>Journal of Multilingual and Multicultural Development</source>
        <volume>38</volume>
        <issue>9</issue>
        <fpage>815</fpage>
        <lpage>830</lpage>
        <pub-id pub-id-type="doi">10.1080/01434632.2016.1268146</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref41">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Mai</surname>
            <given-names>Ziyin</given-names>
          </name>
          <name>
            <surname>Deng</surname>
            <given-names>Xiangjun</given-names>
          </name>
        </person-group>
        <year>2019</year>
        <article-title>Selective vulnerability and dominant language transfer in the acquisition of the Chinese cleft construction by heritage speakers</article-title>
        <source>Linguistic Approaches to Bilingualism</source>
        <volume>9</volume>
        <issue>2</issue>
        <fpage>202</fpage>
        <lpage>227</lpage>
        <pub-id pub-id-type="doi">10.1075/lab.16040.mai</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref42">
      <element-citation publication-type="book-chapter">
        <person-group person-group-type="author">
          <name>
            <surname>Mesthrie</surname>
            <given-names>Rajend</given-names>
          </name>
          <name>
            <surname>Leap</surname>
            <given-names>William L.</given-names>
          </name>
        </person-group>
        <year>2000</year>
        <chapter-title>Language contact I: Maintenance, shift and death</chapter-title>
        <source>Introducing sociolinguistics</source>
        <person-group person-group-type="editor">
          <name>
            <surname>Mesthrie</surname>
            <given-names>R.</given-names>
          </name>
          <name>
            <surname>Swann</surname>
            <given-names>J.</given-names>
          </name>
          <name>
            <surname>Deumert</surname>
            <given-names>A.</given-names>
          </name>
          <name>
            <surname>William</surname>
            <given-names>L. L.</given-names>
          </name>
        </person-group>
        <fpage>248</fpage>
        <lpage>278</lpage>
        <publisher-name>Edinburgh University Press</publisher-name>
        <publisher-loc>Edinburgh</publisher-loc>
        <pub-id pub-id-type="doi">10.1515/9780748632497-012</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref43">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Moher</surname>
            <given-names>David</given-names>
          </name>
          <name>
            <surname>Liberati</surname>
            <given-names>Alessandro</given-names>
          </name>
          <name>
            <surname>Tetzlaff</surname>
            <given-names>Jennifer</given-names>
          </name>
          <name>
            <surname>Altman</surname>
            <given-names>Douglas G.</given-names>
          </name>
        </person-group>
        <year>2009</year>
        <article-title>Preferred reporting items for systematic reviews and meta-analyses: The PRISMA statement</article-title>
        <source>Annals of Internal Medicine</source>
        <volume>151</volume>
        <issue>4</issue>
        <fpage>264</fpage>
        <lpage>269</lpage>
        <pub-id pub-id-type="doi">10.7326/0003-4819-151-4-200908180-00135</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref44">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Montrul</surname>
            <given-names>Silvina</given-names>
          </name>
        </person-group>
        <year>2010</year>
        <article-title>Current issues in heritage language acquisition</article-title>
        <source>Annual Review of Applied Linguistics</source>
        <volume>30</volume>
        <fpage>3</fpage>
        <lpage>23</lpage>
        <pub-id pub-id-type="doi">10.1017/S0267190510000103</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref45">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Mu</surname>
            <given-names>Guanglun Michael</given-names>
          </name>
        </person-group>
        <year>2014</year>
        <article-title>Learning Chinese as a heritage language in Australia and beyond: The role of capital</article-title>
        <source>Language and Education</source>
        <volume>28</volume>
        <issue>5</issue>
        <fpage>477</fpage>
        <lpage>492</lpage>
        <pub-id pub-id-type="doi">10.1080/09500782.2014.908905</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref46">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Mu</surname>
            <given-names>Guanglun Michael</given-names>
          </name>
        </person-group>
        <year>2016</year>
        <article-title>Looking Chinese and learning Chinese as a heritage language: The role of habitus</article-title>
        <source>Journal of Language, Identity &amp; Education</source>
        <volume>15</volume>
        <issue>5</issue>
        <fpage>293</fpage>
        <lpage>305</lpage>
        <pub-id pub-id-type="doi">10.1080/15348458.2016.1214586</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref47">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Mu</surname>
            <given-names>Guanglun Michael</given-names>
          </name>
          <name>
            <surname>Dooley</surname>
            <given-names>Karen</given-names>
          </name>
        </person-group>
        <year>2015</year>
        <article-title>Coming into an inheritance: Family support and Chinese heritage language learning</article-title>
        <source>International Journal of Bilingual Education and Bilingualism</source>
        <volume>18</volume>
        <issue>4</issue>
        <fpage>501</fpage>
        <lpage>515</lpage>
        <pub-id pub-id-type="doi">10.1080/13670050.2014.928258</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref48">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Noro</surname>
            <given-names>Hiroko</given-names>
          </name>
        </person-group>
        <year>2009</year>
        <article-title>The role of Japanese as a heritage language in constructing ethnic identity among Hapa Japanese Canadian children</article-title>
        <source>Journal of Multilingual and Multicultural Development</source>
        <volume>30</volume>
        <issue>1</issue>
        <fpage>1</fpage>
        <lpage>18</lpage>
        <pub-id pub-id-type="doi">10.1080/01434630802307874</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref49">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name>
            <surname>Paciocco</surname>
            <given-names>Adua</given-names>
          </name>
        </person-group>
        <year>2018</year>
        <article-title>Performing Chinese diasporic identity through Mandarin: The case of Italian-schooled Chinese migrant youth in Prato (Italy)</article-title>
        <source>Journal of Language, Identity &amp; Education</source>
        <volume>17</volume>
        <issue>4</issue>
        <fpage>207</fpage>
        <lpage>221</lpage>
        <pub-id pub-id-type="doi">10.1080/15348458.2018.1437348</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref50">
      <element-citation publication-type="book">
        <person-group person-group-type="author">
          <name>
            <surname>Polinsky</surname>
            <given-names>Maria</given-names>
          </name>
          <name>
            <surname>Zhang</surname>
            <given-names>Boyan</given-names>
          </name>
          <name>
            <surname>Gallo</surname>
            <given-names>Carlos Gomez</given-names>
          </name>
        </person-group>
        <year>2010</year>
        <source>Heritage Chinese: A new view from production</source>
        <publisher-loc>Honolulu</publisher-loc>
        <publisher-name>Fourth Heritage Language Institute, University of Hawaii National Foreign Language Resource Center</publisher-name>
      </element-citation>
    </ref>
    
    <ref id="ref51">
      <element-citation publication-type="data">
        <person-group person-group-type="author">
          <name><surname>Ruggles</surname><given-names>Steven</given-names></name>
          <name><surname>Sobek</surname><given-names>Matthew</given-names></name>
          <name><surname>Alexander</surname><given-names>Trent J.</given-names></name>
          <name><surname>Fitch</surname><given-names>Catherine A.</given-names></name>
          <name><surname>Goeken</surname><given-names>Ronald</given-names></name>
          <name><surname>Hall</surname><given-names>Patricia</given-names></name>
          <name><surname>Kelly</surname><given-names>King</given-names></name>
          <name><surname>Miriam</surname></name>
          <name><surname>Ronnander</surname><given-names>Chad</given-names></name>
        </person-group>
        <year>2004</year>
        <source>Integrated Public Use Microdata Series: Version 3.0 [Machine-readable database]</source>
        <publisher-loc>Minneapolis, MN</publisher-loc>
        <publisher-name>Minnesota Population Center</publisher-name>
      </element-citation>
    </ref>
    
    <ref id="ref52">
      <element-citation publication-type="chapter">
        <person-group person-group-type="author">
          <name><surname>Ruzza</surname><given-names>Carlo</given-names></name>
        </person-group>
        <year>2000</year>
        <chapter-title>Language and nationalism in Italy: Language as a weak marker of identity</chapter-title>
        <source>Language and nationalism in Europe</source>
        <person-group person-group-type="editor">
          <name><surname>Barbour</surname><given-names>Stephen</given-names></name>
          <name><surname>Carmichael</surname><given-names>Cathie</given-names></name>
        </person-group>
        <fpage>168</fpage>
        <lpage>182</lpage>
        <publisher-name>Oxford University Press</publisher-name>
        <pub-id pub-id-type="handle">11572/63860</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref53">
      <element-citation publication-type="book">
        <person-group person-group-type="editor">
          <name><surname>Schalley</surname><given-names>Andrea C.</given-names></name>
          <name><surname>Eisenchlas</surname><given-names>Susana A.</given-names></name>
        </person-group>
        <year>2020</year>
        <source>Handbook of home language maintenance and development: Social and affective factors</source>
        <publisher-loc>Berlin</publisher-loc>
        <publisher-name>De Gruyter Mouton</publisher-name>
        <pub-id pub-id-type="doi">10.1515/9781501510175</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref54">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Smith</surname><given-names>Sara A.</given-names></name>
          <name><surname>Li</surname><given-names>Zhengjie</given-names></name>
        </person-group>
        <year>2020</year>
        <article-title>Closing the enjoyment gap: Heritage language maintenance motivation and reading attitudes among Chinese-American children</article-title>
        <source>International Journal of Bilingual Education and Bilingualism</source>
        <volume>25</volume>
        <issue>3</issue>
        <fpage>1070</fpage>
        <lpage>1087</lpage>
        <pub-id pub-id-type="doi">10.1080/13670050.2020.1742653</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref55">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Stentiford</surname><given-names>Lauren</given-names></name>
          <name><surname>Koutsouris</surname><given-names>George</given-names></name>
        </person-group>
        <year>2021</year>
        <article-title>What are inclusive pedagogies in higher education? A systematic scoping review</article-title>
        <source>Studies in Higher Education</source>
        <volume>46</volume>
        <issue>11</issue>
        <fpage>2245</fpage>
        <lpage>2261</lpage>
        <pub-id pub-id-type="doi">10.1080/03075079.2020.1716322</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref56">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Tam</surname><given-names>Hugo Wing-Yu</given-names></name>
          <name><surname>Kim</surname><given-names>Sun-A</given-names></name>
        </person-group>
        <year>2021</year>
        <article-title>Strategies used in learning Chinese vocabulary by adolescent Mandarin-Korean bilinguals in Korea</article-title>
        <source>International Journal of Multilingualism</source>
        <volume>21</volume>
        <issue>1</issue>
        <fpage>36</fpage>
        <lpage>59</lpage>
        <pub-id pub-id-type="doi">10.1080/14790718.2021.2004152</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref57">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Tang</surname><given-names>Xiruo</given-names></name>
          <name><surname>Zheng</surname><given-names>Yongyan</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>Unpacking complex language ideologies toward heritage language maintenance: A case of Chinese migrant families in the US</article-title>
        <source>International Multilingual Research Journal</source>
        <volume>17</volume>
        <issue>4</issue>
        <fpage>333</fpage>
        <lpage>350</lpage>
        <pub-id pub-id-type="doi">10.1080/19313152.2023.2209358</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref58">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Thomas</surname><given-names>James</given-names></name>
          <name><surname>Harden</surname><given-names>Angela</given-names></name>
        </person-group>
        <year>2008</year>
        <article-title>Methods for the thematic synthesis of qualitative research in systematic reviews</article-title>
        <source>BMC Medical Research Methodology</source>
        <volume>8</volume>
        <elocation-id>45</elocation-id>
        <pub-id pub-id-type="doi">10.1186/1471-2288-8-45</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref59">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Tian</surname><given-names>Ye</given-names></name>
        </person-group>
        <year>2017</year>
        <article-title>‘Sorry, but they don’t want Chinese Americans to participate’: A case study of tracking in an Ivy League Chinese language programme</article-title>
        <source>International Journal of Multilingualism</source>
        <volume>14</volume>
        <issue>4</issue>
        <fpage>437</fpage>
        <lpage>462</lpage>
        <pub-id pub-id-type="doi">10.1080/14790718.2017.1278765</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref60">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Tong</surname><given-names>Peiru</given-names></name>
          <name><surname>Tsung</surname><given-names>Linda</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>Different trajectories of heritage language identity development through short-term study abroad programs: The case of Chinese heritage learners</article-title>
        <source>Sustainability</source>
        <volume>15</volume>
        <issue>8</issue>
        <elocation-id>6392</elocation-id>
        <pub-id pub-id-type="doi">10.3390/su15086392</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref61">
      <element-citation publication-type="webpage">
        <person-group person-group-type="author">
          <collab>US Census Bureau</collab>
        </person-group>
        <date iso-8601-date="2013-09-11">
          <day>11</day>
          <month>09</month>
          <year>2013</year>
        </date>
        <article-title>Nearly 3 million U.S. residents speak Chinese at home, Census Bureau reports</article-title>
        <uri>https://www.census.gov/newsroom/archives/2013-pr/cb13-r90.html</uri>
      </element-citation>
    </ref> 
    
    <ref id="ref62">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Visonà</surname><given-names>Mark Winston</given-names></name>
          <name><surname>Plonsky</surname><given-names>Luke</given-names></name>
        </person-group>
        <year>2020</year>
        <article-title>Arabic as a heritage language: A scoping review</article-title>
        <source>International Journal of Bilingualism</source>
        <volume>24</volume>
        <issue>4</issue>
        <fpage>599</fpage>
        <lpage>615</lpage>
        <pub-id pub-id-type="doi">10.1177/1367006919849110</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref63">
      <element-citation publication-type="book">
        <person-group person-group-type="editor">
          <name><surname>Wang</surname><given-names>Danping</given-names></name>
          <name><surname>East</surname><given-names>Martin</given-names></name>
        </person-group>
        <year>2023</year>
        <source>Teaching Chinese in the Anglophone world: Perspectives from New Zealand</source>
        <publisher-name>Springer</publisher-name>
        <publisher-loc>New York</publisher-loc>
        <pub-id pub-id-type="doi">10.1007/978-3-031-35475-5_1</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref64">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wang</surname><given-names>Lanting</given-names></name>
          <name><surname>Hamid</surname><given-names>M. Obaidul</given-names></name>
        </person-group>
        <year>2022</year>
        <article-title>The role of polymedia in heritage language maintenance: A family language policy perspective</article-title>
        <source>Journal of Multilingual and Multicultural Development</source>
        <volume>45</volume>
        <issue>10</issue>
        <fpage>4139</fpage>
        <lpage>4153</lpage>
        <pub-id pub-id-type="doi">10.1080/01434632.2022.2142233</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref65">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wang</surname><given-names>Yining</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>Speaking Chinese or no breakfast: Emotional challenges and experiences confronting Chinese immigrant families in heritage language maintenance</article-title>
        <source>International Journal of Bilingualism</source>
        <volume>27</volume>
        <issue>2</issue>
        <fpage>232</fpage>
        <lpage>250</lpage>
        <pub-id pub-id-type="doi">10.1177/13670069221126043</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref66">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wu</surname><given-names>Hsu-Pai</given-names></name>
          <name><surname>Palmer</surname><given-names>Deborah K</given-names></name>
          <name><surname>Field</surname><given-names>Sherry L.</given-names></name>
        </person-group>
        <year>2011</year>
        <article-title>Understanding teachers’ professional identity and beliefs in the Chinese heritage language school in the USA</article-title>
        <source>Language, Culture and Curriculum</source>
        <volume>24</volume>
        <issue>1</issue>
        <fpage>47</fpage>
        <lpage>60</lpage>
        <pub-id pub-id-type="doi">10.1080/07908318.2010.545413</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref67">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wu</surname><given-names>Ming-Hsuan</given-names></name>
          <name><surname>Lee</surname><given-names>Kathy</given-names></name>
          <name><surname>Leung</surname><given-names>Genevieve</given-names></name>
        </person-group>
        <year>2014</year>
        <article-title>Heritage language education and investment among Asian American middle schoolers: Insights from a charter school</article-title>
        <source>Language and Education</source>
        <volume>28</volume>
        <issue>1</issue>
        <fpage>19</fpage>
        <lpage>33</lpage>
        <pub-id pub-id-type="doi">10.1080/09500782.2013.763818</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref68">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wu</surname><given-names>Ming-Hsuan</given-names></name>
          <name><surname>Leung</surname><given-names>Genevieve</given-names></name>
        </person-group>
        <year>2022</year>
        <article-title>‘It’s not my Chinese’: A teacher and her students disrupting and dismantling conventional notions of ‘Chinese’ through translanguaging in a heritage language classroom</article-title>
        <source>International Journal of Bilingual Education and Bilingualism</source>
        <volume>25</volume>
        <issue>5</issue>
        <fpage>1811</fpage>
        <lpage>1824</lpage>
        <pub-id pub-id-type="doi">10.1080/13670050.2020.1804524</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref69">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Wu</surname><given-names>Nina H.</given-names></name>
          <name><surname>Kim</surname><given-names>Su Yeong</given-names></name>
        </person-group>
        <year>2009</year>
        <article-title>Chinese American adolescents’ perceptions of the language brokering experience as a sense of burden and sense of efficacy</article-title>
        <source>Journal of Youth and Adolescence</source>
        <volume>38</volume>
        <issue>5</issue>
        <fpage>703</fpage>
        <lpage>718</lpage>
        <pub-id pub-id-type="doi">10.1007/s10964-008-9379-3</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref70">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Yang</surname><given-names>Chun-Ting</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>Student ethnic identity and heritage language ideologies at a Chinese Saturday school</article-title>
        <source>International Journal of Bilingual Education and Bilingualism</source>
        <volume>27</volume>
        <issue>2</issue>
        <fpage>253</fpage>
        <lpage>267</lpage>
        <pub-id pub-id-type="doi">10.1080/13670050.2023.2166395</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref71">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Yang</surname><given-names>Yilu</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>The role of heritage language in multiple dimensions of ethnic identity: A case study of Chinese-Australian adolescents</article-title>
        <source>International Journal of Multilingualism</source>
        <volume>21</volume>
        <issue>4</issue>
        <fpage>1775</fpage>
        <lpage>1798</lpage>
        <pub-id pub-id-type="doi">10.1080/14790718.2023.2210284</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref72">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Donghui</given-names></name>
        </person-group>
        <year>2012</year>
        <article-title>Co-ethnic network, social class, and heritage language maintenance among Chinese immigrant families</article-title>
        <source>Journal of Language, Identity &amp; Education</source>
        <volume>11</volume>
        <issue>3</issue>
        <fpage>200</fpage>
        <lpage>223</lpage>
        <pub-id pub-id-type="doi">10.1080/15348458.2012.686408</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref73">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Dongbo</given-names></name>
          <name><surname>Koda</surname><given-names>Keiko</given-names></name>
        </person-group>
        <year>2011</year>
        <article-title>Home literacy environment and word knowledge development: A study of young learners of Chinese as a heritage language</article-title>
        <source>Bilingual Research Journal</source>
        <volume>34</volume>
        <issue>1</issue>
        <fpage>4</fpage>
        <lpage>18</lpage>
        <pub-id pub-id-type="doi">10.1080/15235882.2011.568591</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref74">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Donghui</given-names></name>
          <name><surname>Slaughter-Defoe</surname><given-names>Diana T.</given-names></name>
        </person-group>
        <year>2009</year>
        <article-title>Language attitudes and heritage language maintenance among Chinese immigrant families in the USA</article-title>
        <source>Language, Culture and Curriculum</source>
        <volume>22</volume>
        <issue>2</issue>
        <fpage>77</fpage>
        <lpage>93</lpage>
        <pub-id pub-id-type="doi">10.1080/07908310902935940</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref75">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
          <name><surname>Koda</surname><given-names>Keiko</given-names></name>
        </person-group>
        <year>2018</year>
        <article-title>Vocabulary knowledge and morphological awareness in Chinese as a heritage language (CHL) reading comprehension ability</article-title>
        <source>Reading and Writing</source>
        <volume>31</volume>
        <issue>1</issue>
        <fpage>53</fpage>
        <lpage>74</lpage>
        <pub-id pub-id-type="doi">10.1007/s11145-017-9773-x</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref76">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
          <name><surname>Koda</surname><given-names>Keiko</given-names></name>
        </person-group>
        <year>2018</year>
        <article-title>Word-knowledge development in Chinese as a heritage language learners: A comparative study</article-title>
        <source>Studies in Second Language Acquisition</source>
        <volume>40</volume>
        <issue>1</issue>
        <fpage>201</fpage>
        <lpage>223</lpage>
        <pub-id pub-id-type="doi">10.1017/S0272263116000450</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref77">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
          <name><surname>Koda</surname><given-names>Keiko</given-names></name>
        </person-group>
        <year>2021</year>
        <article-title>Cross-linguistic morphological awareness in Chinese heritage language reading acquisition</article-title>
        <source>Journal of Psycholinguistic Research</source>
        <volume>50</volume>
        <issue>2</issue>
        <fpage>335</fpage>
        <lpage>353</lpage>
        <pub-id pub-id-type="doi">10.1007/s10936-020-09722-7</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref78">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
          <name><surname>Koda</surname><given-names>Keiko</given-names></name>
        </person-group>
        <year>2021</year>
        <article-title>Early oral language in Chinese heritage language reading development</article-title>
        <source>Foreign Language Annals</source>
        <volume>54</volume>
        <issue>4</issue>
        <fpage>1107</fpage>
        <lpage>1123</lpage>
        <pub-id pub-id-type="doi">10.1111/flan.12562</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref79">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
        </person-group>
        <year>2016</year>
        <article-title>Early language input and later reading development in Chinese as heritage language (CHL) learners</article-title>
        <source>International Journal of Applied Linguistics</source>
        <volume>26</volume>
        <issue>3</issue>
        <fpage>437</fpage>
        <lpage>448</lpage>
        <pub-id pub-id-type="doi">10.1111/ijal.12146</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref80">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Haomin</given-names></name>
          <name><surname>Zhang</surname><given-names>Xing</given-names></name>
          <name><surname>Wang</surname><given-names>Chichi</given-names></name>
          <name><surname>Sun</surname><given-names>Jie</given-names></name>
          <name><surname>Pei</surname><given-names>Zhenxia</given-names></name>
        </person-group>
        <year>2022</year>
        <article-title>Word knowledge in L2 Chinese lexical inference: A moderated path analysis of language proficiency level and heritage status</article-title>
        <source>Frontiers in Psychology</source>
        <volume>13</volume>
        <fpage>869368</fpage>
        <pub-id pub-id-type="doi">10.3389/fpsyg.2022.869368</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref81">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhang</surname><given-names>Jingning</given-names></name>
        </person-group>
        <year>2009</year>
        <article-title>Mandarin maintenance among immigrant children from the People’s Republic of China: An examination of individual networks of linguistic contact</article-title>
        <source>Language, Culture and Curriculum</source>
        <volume>22</volume>
        <issue>3</issue>
        <fpage>195</fpage>
        <lpage>213</lpage>
        <pub-id pub-id-type="doi">10.1080/07908310903308279</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref82">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhao</surname><given-names>Sumin</given-names></name>
          <name><surname>Hewitt</surname><given-names>Rosie</given-names></name>
        </person-group>
        <year>2020</year>
        <article-title>Young Chinese immigrant children’s language and literacy practices on social media: A translanguaging perspective</article-title>
        <source>Language and Education</source>
        <volume>34</volume>
        <issue>3</issue>
        <fpage>267</fpage>
        <lpage>285</lpage>
        <pub-id pub-id-type="doi">10.1080/09500782.2019.1656738</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref83">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhou</surname><given-names>Adler Yang</given-names></name>
        </person-group>
        <year>2022</year>
        <article-title>Applying cognitive linguistics to teaching Chinese classifiers: Evidence from teaching Chinese as a heritage language in Germany</article-title>
        <source>Language Teaching Research</source>
        <pub-id pub-id-type="doi">10.1177/13621688221098184</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref84">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhou</surname><given-names>Yue</given-names></name>
          <name><surname>Liu</surname><given-names>Yongcan</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>Theorising the dynamics of heritage language identity development: A narrative inquiry of the life histories of three Chinese heritage speakers</article-title>
        <source>Language and Education</source>
        <volume>37</volume>
        <issue>3</issue>
        <fpage>383</fpage>
        <lpage>400</lpage>
        <pub-id pub-id-type="doi">10.1080/09500782.2022.2068351</pub-id>
      </element-citation>
    </ref>
    
    <ref id="ref85">
      <element-citation publication-type="journal">
        <person-group person-group-type="author">
          <name><surname>Zhu</surname><given-names>Xinhua</given-names></name>
          <name><surname>Chan</surname><given-names>Shui Duen</given-names></name>
          <name><surname>Yao</surname><given-names>Yuan</given-names></name>
        </person-group>
        <year>2023</year>
        <article-title>The associations of parental support with first-grade primary school L2 Chinese learners’ ideal selves, motivation, engagement, and reading test performance in Hong Kong: A person-centered approach</article-title>
        <source>Early Education and Development</source>
        <volume>34</volume>
        <issue>7</issue>
        <fpage>1647</fpage>
        <lpage>1664</lpage>
        <pub-id pub-id-type="doi">10.1080/10409289.2022.2139544</pub-id>
      </element-citation>
    </ref>

  </ref-list>
</back>
</article>
