He is the founding Director of Centre for Evidence-Based Chinese Medicine since May 2005, and PhD student supervisor, head of School of Basic Medical Science at Beijing University of Chinese Medicine. He is an advisor for traditional medicine of WHO-WPRO (West Pacific Region Office), and a "Chang Jiang Scholar" Professor awarded by the Ministry of Education, P.R. CHINA. He completed his PhD in infectious disease in 1992, and has background in clinical medicine, traditional Chinese medicine, public health, clinical epidemiology, and Cochrane Collaboration activities. His main research interests are in the areas of systematic review of interventions of traditional Chinese medicine, clinical research and research methodology. He is the member of the Cochrane Complementary Medicine Field Advisory Board, member of the Board of Directors of International Society of Complementary Medicine Research (ISCMR); editors of the Cochrane Hepato-Biliary Group, "European Journal of Integrative Medicine", "FACT", associate editors of BMC Complementary and Alternative Medicine, "Chinese Medicine" journal, and Complementary Therapy in Medicine, editors of "Journal of Traditional Chinese Medical Science", "Chinese Journal of Integrated Traditional and Western Medicine", "Journal of Integrated Medicine", "Journal of Evidence-Based Medicine", and "World Journal of Traditional Chinese Medicine". He is a peer reviewer for more than 30 international journals. He authored 8 books, co-authored 8 books, and published more than 450 papers in peer reviewed journals.