Director of the Second Ward of the Gastrointestinal Center, Deputy Director of the Surgical Teaching and Research Section, Chief Physician, Professor and Doctoral Supervisor at Peking University Cancer Hospital. Specialties: function‑preserving surgery for early gastric cancer, sphincter‑preserving surgery for low‑lying rectal cancer, minimally invasive radical surgery for gastrointestinal tumors, etc. He is mainly engaged in surgical treatment and related research on gastrointestinal tumors. He excels at function‑preserving surgery for early gastric cancer, sphincter‑preserving surgery for low‑lying rectal cancer, minimally invasive radical surgery for gastrointestinal tumors and other procedures. He pursues minimally invasive and precise surgical techniques, and attaches importance to the protection of patients' neurological function and quality of life. Main research directions: surgical and comprehensive treatment of gastrointestinal tumors, patterns of lymph node metastasis in early gastric cancer and function‑preserving surgery for gastric cancer, immune microenvironment atlas of gastrointestinal tumors, etc. As a project/principal investigator, he has presided over and participated in multiple national‑level projects, including General Program of National Natural Science Foundation of China, National Key R&D Program, Major Research Plan of National Natural Science Foundation of China, and so on. As corresponding or co‑corresponding author, he has guided students to publish numerous academic papers in top‑tier journals such as Cell, Science, Science Bulletin, Nature Communications, and Genome Biology. As the first completer, he has been awarded the Excellent Teaching Management Award of Peking University Health Science Center and the Excellent Teaching Collective of Peking University Cancer Hospital. As a major contributor, he received the First Prize of the Chinese Medical Science and Technology Award, and the First Prize of the Natural Science Award of the Beijing Science and Technology Award in 2025. Serving as co‑editor‑in‑chief or associate editor, he has published monographs and translated works including *Diagnostic and Therapeutic Thinking in General Surgery Diseases*, *Manual of Common Techniques for Tumor Tissue Biobanks*, *Bethesda Handbook of Clinical Oncology*, *Standardized Surgery for Gastric Cancer*, and *Standardized Surgery for Colorectal Cancer*.