Professor Cheung's main research interest is stroke and cerebrovascular disease. He has an established track record in experimental research. He is also interested in research on headache and central nervous system infections. He has published 156 journal articles, 5 books, 26 book chapters, 1 monograph and 20 extended abstracts. He is a regular reviewer of 59 international journals and a regular reviewer of 3 local/regional journals. He is/was also an editorial board member of 13 international journals and 2 regional journals, including Stroke, Chinese version of Stroke and Journal of Pineal Research.

Professor Cheung is very enthusiastic about participating in contemporary international multi-center clinical trials. He is/was principal investigator of the 26 multicentre international trials. He is/was also principal investigator of the several local clinical trials. He has been successful in competitive external grant applications. In addition, he has received generous donations from individuals, non-pharmaceutical organizations and pharmaceutical companies.