Amidst the rapid processes of industrialization and globalization, the interplay between minority and majority languages has garnered increasing attention, highlighting concerns surrounding linguistic diversity and the efficacious enactment of language policies. This study delves into the intricacies of language planning within the familial domain, specifically scrutinizing Chaoshan families in the Chaoshan region as pivotal arenas for nurturing the enduring vitality of Teochew. Employing a methodological approach integrating family visits, interaction recordings, and interviews, this study probes the dynamics of family language policies and individuals' perceptions vis-à-vis the nexus between linguistic practices and identity formation, with particular emphasis on intergenerational transmission. The results highlight that although Teochew continues to be actively used in family conversations and is closely linked to local identity formation, it is gradually losing ground among younger generations. This decline in passing down the dialect from one generation to the next is noticeable and poses a challenge to its long-term continuity. These insights indicate potential challenges to the sustained perpetuation of Teochew, warranting concerted societal and individual endeavors to safeguard its status as a cherished linguistic asset. The study underscores the importance of societal and individual efforts in preserving Teochew as a valuable linguistic resource.