Consultant for the adjustment and formulation of the National Basic Medical Insurance Drug List and the Industrial Injury Insurance Drug List in 2004; Member of Chinese Medical Association/Beijing Medical Association medical accident technical appraisal expert database; Chairman of the Medical Expert Committee of Beijing Medical Award Foundation. Served as the editorial board and reviewer of many domestic magazines. In recent years, domestic and foreign statistical source journals have published more than 100 articles, including 3 monographs, deputy editor 1 person and 5 editors. He has rich clinical experience in solving difficult and rare diseases in gastroenterology and related majors. Proficient in specialized operations such as diagnosis and treatment technology under gastroscope and enteroscope. Good at: 1, clinical gastroenterology, including the diagnosis and treatment of esophageal, gastric, intestinal, pancreatic and biliary diseases; Diagnosis and differential diagnosis of difficult diseases. 2. Diagnosis and treatment under gastroscope and colonoscopy. 3. Molecular biological research on digestive tract hormones and digestive tract tumors. 4. General survey of gastrointestinal tumors. 5. Early diagnosis, prevention, clinical and endoscopic diagnosis and treatment of colorectal tumors. 6. Basic and clinical research on inflammatory bowel disease (ulcerative colitis, Crohn's disease).