Professor Leung is currently the Li Shu Fan Medical Foundation Professor in Gastroenterology. He is also the Chief Director of the Clinical Trials Centre and the Associate Dean (Research) of the Li Ka Shing Faculty of Medicine of the University of Hong Kong. Professor Leung graduated from the Faculty of Medicine of the Chinese University of Hong Kong in 1991 and completed his residency and fellowship at the Prince of Wales Hospital of Hong Kong. He then furthered his training overseas at the Division of Gastroenterology, Baylor College of Medicine, USA. Professor Leung has a wide research interest in gastroenterology and endoscopy including Helicobacter pylori and gastric carcinogenesis, inflammatory bowel disease, capsule endoscopy, screening colonoscopy and epigenetic changes in gastrointestinal cancer. He has published more than 280 original articles with a h-index of 66 (Scopus). He is the editorial board member of the Helicobacter, Journal of Digestive Disease and the Chinese Journal of Digestion. He was the Past President of the Hong Kong IBD Society (2013-2015), Chair of the Scientific Committee of the Asia Pacific Digestive Week 2017 and currently the Vice President of the Hong Kong Society of Gastroenterology.