In the western literature, mathematics achievement and its related student self-concept are important education outcomes reciprocally linked and mutually reinforcing. The reciprocal relation model is examined in this study to assess its generalization in a cross-cultural setting. Hong Kong is the site of choice because of its exposure to influences between British and Chinese cultures. A contextual factor of English push has been examined for male and female students behind the language switch from English to Chinese (Cantonese) in most secondary schools. The research findings are employed to compare features of the reciprocal model two years before and after Hong Kong's sovereignty handover from the United Kingdom to China. (Contains 4 tables, 1 figure, and 3 notes.)