Professor Cheung specialises in Chinese Etymology, Ancient Chinese texts, Chinese Paleographic sources, Classical Chinese Literature, and identification of genuine and fake Ancient Chinese Bronzes and Bamboo manuscripts.
He is currently appointed as Professor of the School of History at Beijing Normal University, Honorary Professor of the School of Chinese at the University of Hong Kong, Honorary Professor of the Institute of Han Language at An Hui University and Academic Consultant of the Institute of Chinese Paleography at Zhong Shan University, Adjunct Professor of the Institute of Chinese Medicine at The Chinese University of Hong Kong, and Adjunct Professor of the Department of Chinese at The Hong Kong Institute of Education.
In the past, Professor Cheung served as Professor of the Department of Chinese Language and Literature at the Chinese University of Hong Kong, Consultant of The Municipal Committee for the Authentication of Cultural Relics at the Shanghai Museum, and Member of the Consultation Committee of Academic Affairs at the Institute of History and Philology, Academia Sinica, Taipei, Taiwan.