Director of the Radiotherapy Department, Peking University Cancer Hospital, Chief Physician, and Professor. Specializes in precise radiotherapy for digestive system tumors such as rectal cancer. Has dedicated over 20 years of in-depth research in the treatment of primary and metastatic liver cancer, achieving a series of groundbreaking results that have significantly improved patient survival rates. Served as the editor-in-chief of the "Chinese Guidelines for Radiotherapy of Primary Hepatocellular Carcinoma" and "Radiotherapy for Abdominal Tumors," among other monographs. Holds positions as a Standing Committee Member of the Chinese Society for Radiation Oncology, Chair of the Liver Cancer Group of the Chinese Medical Doctor Association's Radiation Oncology Physicians Branch, and Vice Chair of the First Committee on Integrated Organ Transplantation Oncology of the Chinese Anti-Cancer Association. Has published over a hundred papers. Received honors such as the national "People's Renowned Doctor" title.