The critical role that family plays in Chinese Heritage Language learning (CHLL) has gained increasing attention from psychological, political and sociological scholarships. Guided by Bourdieu's notion of "habitus", our mixed methods sociological study firstly addresses the need for quantitative evidence on the relationship between family support and Chinese Heritage Language (CHL) proficiency through a survey of 230 young Chinese Australians; and then explores the dynamics of family support of CHLL through multiple interviews with five participants. The interview data demonstrate ongoing intergenerational reproduction of CHL through various forms of family inculcation. Learners' transition from resistance to commitment is a focus of the analysis. Extant research struggles to theorise the reasons behind this transition. We offer a Bourdieusian explanation that construes the transition as "habitus realisation". Our study has implications for CHL researchers, Chinese immigrant parents and Chinese teachers.