Assistant Dean of China Academy of Medical Sciences, Assistant Dean of Peking Union Medical College, Dean of School of Public Health, distinguished professor of Epidemiology, doctoral supervisor. Vice Chairman of Health Management Branch of Chinese Medical Association, Vice Chairman and Secretary-General of Health Risk Assessment and Control Committee of Chinese Preventive Medical Association, Vice Chairman of Physician Health Management and Physician Health Insurance Committee of Chinese Medical Association, Vice Chairman of National Health Industry Expert Committee, Health Manager of Vocational Skills Appraisal and Guidance Center of Ministry of Health, Vice Chairman of Beijing Health Education Association, Visiting Professor of Beijing Zhao Guang Institute of Public Health, China Health Education Association, Beijing Medical Education Association, Popular Science Branch of Chinese Medical Association, China Preventive Medical Association and China Sustainable Development Association. Member of the National Expert Advisory Committee for Public Health Emergencies of the Ministry of Health, member of the Expert Steering Committee for Health Management Cadres of the Ministry of Health, head of the Public Health Professional Committee, and member of the China Medical and Health Expert Committee of the United Nations Industrial Development Organization.