- Director and tutor of the National Coronary Intervention Training Base of National Health Commission of PRC;

Dr. Li is a member of the Youth Committee of ERAS (enhanced recovery after surgery) as well as hernia and abdominal wall in the surgeon branch of Chinese Medical Doctor Association. Additionally, he is a member of the Youth Committee of Gastrointestinal surgery branch as well as the parenteral and enteral nutrition in Guangdong Medical Association.

Visiting fellow at the Harvard-affiliated Dana-Farber Cancer Center and Brigham & Women's Hospital. Member of the expert committee of the Chinese Society of Clinical Oncology (CSCO) on gastrointestinal stromal tumors.

Editor of Journal of Digestive Tumors and a member of the Professional Committee of Digestive Tract Tumor Society of China Research Hospital. His expertise is in standard surgery and comprehensive treatment of esophageal cancer, gastric cancer, colorectal and anal cancer, gastrointestinal stromal tumor and inflammatory bowel disease.

Member of the professional committee of gastric cancer of China Anti-cancer Association. Member of Academic Steering Committee of Chinese Anti-cancer society for rehabilitation.Member of the professional committee of gastric cancer and Colorectal Cancer of Guangdong Anti-cancer Association. Member of Guangdong Provincial Physicians Association for Accelerated Rehabilitation Surgery.

Visiting scholar of the National Cancer Institute, Kanazawa University, Japan. Postdoctoral fellow of Ireland Cancer Center at Case Western Reserve University,USA. Vice chairman of the Second Youth Committee of Colorectal Cancer Professional Committee of China Anti-cancer Association.

Professor Liu is a secondary grade chief physician in the Department of Gastroenterology and master supervisor in the First Affiliated Hospital of Sun Yat-Sen University.

As Fellow of the American College of Gastroenterology, Fellow of the International Academy of Proctology, Professor of Internal Medicine, Gastroenterology/Hepatology at the California Northstate University College of Medicine, Clinical Professor of Internal Medicine and Gastroenterology at the University of California, Davis School of Medicine, and clinical faculty