Using historical narratives and a qualitative research approach, this paper analyses the social, cultural and cognitive causes of differentiation and stratification among Chinese migrants in the Republic of Ireland. It discusses individuals’ diversified capabilities, attitudes and actual levels of integration, as well as their disparate patterns of self-identification. In the research area of Chinese migrants in Ireland, in-group diversity and its implications is still a novel research topic. With this introductory work, the authors seek to draw more attention to this particular group, especially to the need for studies of encounters between subgroups and longitudinal investigations. The paper points out that subgroups of Chinese migrants in Ireland are divided according to social classification and self-categorisation, which have distinct significances for subgroup members’ integration and identity.