In recent years, there has been an emerging theory of "student identity politics," which focuses on student activism based on race, gender, and sexual identity. Thus far, scholars have not yet systematically extended the analysis of student identity politics to those student activism relating to territorial identity. The student-led territorial identity movement that began in Hong Kong in 2015, which has transformed the center-autonomy relations between Beijing and Hong Kong, offers a case study that enriches the theory of student identity politics by bringing in the notion of territorial identity and opening the door for future comparative studies of territorial identity movements worldwide.