Professional Expertise Diagnosis and treatment of digestive system diseases, with particular research focus on Helicobacter pylori, gastrointestinal precancerous lesions, early-stage cancer, and gastrointestinal bleeding. Proficient in endoscopic diagnosis of various digestive system diseases (including endoscopic ultrasound, etc.); skilled in endoscopic resection (EMR, ESD, etc.) for gastrointestinal precancerous lesions and early-stage cancer. Clinical epidemiology and evidence-based medicine. Work Experience Graduated from Shandong Medical University in July 1985, and was assigned to the Department of Gastroenterology at Peking University Third Hospital upon graduation, where he has been working ever since. Currently serves as Director of the Department of Gastroenterology at Peking University Third Hospital, Director of the Peking University Digestive Disease Research Center, Deputy Director of the Clinical Epidemiology and Evidence-Based Medicine Center at Peking University Third Hospital, and Vice President of the Haidian Campus of Peking University Third Hospital. Research Work Has led and completed over 10 national and provincial/ministerial-level projects. Has received 3 provincial/ministerial-level awards. Serves as an editorial board member and peer reviewer for multiple domestic and international journals, including the National Medical Journal of China, Journal of Peking University (Health Sciences), Histology and Histopathology, and World Journal of Gastrointestinal Endoscopy. Has published over 200 papers, including more than 50 indexed in SCI. Awards 1990: Outstanding Teaching Individual Award, Beijing Medical University; 2014: Outstanding Teacher Award, Peking University Health Science Center; 2015: Second Prize of the Science and Technology Progress Award, Ministry of Education; 2015: Second Prize of the Chinese Medical Science and Technology Award; 2016: Second Prize of the Huaxia Medical Award; 2019: Specialist Excellence Award of the "Revering Life—2019 Honoring Physicians" Public Welfare Campaign; 2020: "Good Teacher and Beneficial Friend" Mentor Award, Peking University Third Hospital. Books and Translations Participated in the compilation and translation of over 20 gastroenterology monographs, including *Modern Gastroenterology* and the third edition of *Gastroenterology* edited by Zheng Zhitian.