In a survey (Walters and Balla 1998), 1,237 full-time students in seven degree programs at the City University of Hong Kong were investigated.  The findings were summed up by the authors in one sentence where possible, instruction is in Cantonese. They further observe that The move from a greater use of English in lectures towards a greater use of Cantonese in tutorials, which is evident in all courses except Law, suggests a situation where the material is presented largely in English to begin with, and then, when it comes to understanding it in detail, both staff and students switch to Cantonese.  However, since Cantonese is not available to expatriate members of staff, it is worth examining the situation more closely. . . .as a greater percentage of the senior positions is held by expatriate staff, a distinct pattern of lecture support develops.  Material which may be delivered in English in the lectures is clarified in Cantonese, or by mixed Cantonese and English, in tutorials. (p378)