Dr. Lin is a committee member of the hematology branch of the Chinese Medical Doctor Association, the hematologic malignancy branch of the China Anti-cancer Association, the hematology branch of the Chinese Geriatrics Society, and vice-director member of the hematology branch of the Guangdong Medical Association and the Guangdong Medical Doctor Association. Dr.

- 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.