Hello, your question is actually meaningless and cannot be answered. Because the arrangement of exchange students is not fixed in which schools. It depends on whether there is a batch exchange program between this school and the University of Hong Kong in which year and semester, which is changing at any time. It also depends on whether your professional teacher or your tutor has a good personal relationship with HKU professors, because private individuals can also promise student exchanges and then announce exchange programs. So if you ask this question, it is impossible for someone to give you a specific answer. Of course, the better the world reputation, the greater the exchange opportunities. For example, Tsinghua, Tongji and other schools will definitely have more exchange opportunities than the two local schools.