Chief Physician, Doctor of Medicine, Head of the Head and Neck Tumor Radiotherapy Specialty at Peking University Cancer Hospital. Clinical Expertise: Head and neck tumors, as well as esophageal tumors. Key Academic Appointments: Standing Committee Member of the Head and Neck Tumor Expert Committee of the Chinese Society of Clinical Oncology; Chairman of the Head and Neck Tumor MDT Committee of the Beijing Cancer Prevention and Treatment Society; Vice Chairman of the Head and Neck Melanoma Committee of the Beijing Cancer Prevention and Treatment Society; Standing Committee Member of the First Head and Neck Molecular Tumor Diagnosis and Treatment Committee of the Beijing Anti-Cancer Association, among others.