Research has confirmed that supportive social networks and associated resources play a critical role in the adaptation of migrating international students to host communities. Access to such social networks and resources requires migrating students to invest in and make efforts at academic socialisation, as mediated by various social processes. This article reports on an examination of 26 mainland Chinese undergraduates' experiences of academic socialisation in a major university in Hong Kong. Drawing on these students' experiential accounts, the inquiry identified a variety of linguistic, sociocultural and ideological challenges that undermine the participants' academic socialisation with local students in Hong Kong. It also recorded strategic efforts undertaken by the participants to align themselves with their local counterparts linguistically and socially. These efforts helped some participants overcome various challenges in academic socialisation but most of them chose to socialise with other mainland Chinese students and further alienate themselves from local students. In light of shifting contextual conditions, it may be increasingly difficult for migrant students to construct a cohesive university community with local students. Therefore, institutions need to invest more in facilitating and supporting different groups of students' engagement with each other in achieving mutual understanding through shared activities.