He is Emeritus Professor of Orthopaedics & Traumatology, Faculty of Medicine; Director of Centre for Clinical Trials on Chinese Medicine, Institute of Chinese Medicine; Director, The Hong Kong Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, 1996-2013; Director, Partner State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong; Hong Kong Ambassador, Metronomics Global Health Initiative since 2016. Professor Leung’s research areas including Orthopaedics, Osteoporosis, Microsurgery, Public Health, Traditional Chinese Medicine and General Education. Currently two medicinal orchids are under investigation: Gastrodia for neuro degeneration and Dendrobium for exocrine malfunctioning. He is the author of over 800 scientific manuscripts in journals and 27 books, and editor of 11 international journals since 1982.