Surgeon introduction Tian Bei, MD, chief physician, associate professor. Member of the Standing Committee of the Chinese Institute of Sports Rehabilitation Education of the Chinese Medical Association, Member of the Sports Medicine Branch of the Chinese Medical Association, Member of the Optometry Group of the Ophthalmologist Branch of the Chinese Medical Doctor Association, Member of the Standing Committee of the Diabetes Professional Committee of the Chinese Geriatric Health Care Association, Member of the Ophthalmology Professional Committee of the Chinese Medical Equipment Association, Member of the Diabetes Ophthalmology Group of the Diabetes Professional Committee of the Chinese Research Hospital Association, and Member of the 12th Health and Wellness Committee of the China Democratic League. Senior visiting scholar of China Study Abroad Fund (State Administration of Foreign Experts), corresponding editorial board of Chinese Journal of Ophthalmology. Honorary research fellow, Royal Eye Hospital, Murphy, UK, and a member of the Vitreoretinal Surgery Association, UK and Ireland. He has been engaged in the first-line clinical work of ophthalmology in Beijing Tongren Ophthalmology Center, Beijing Tongren Hospital affiliated to Capital Medical University for more than 20 years. He is good at vitrectomy, phacoemulsification cataract aspiration, fundus laser surgery, etc. So far, he has more than 10,000 surgical experiences.