Prof. Jun Ma is a Professor and director of Peking University Institute of Children and Adolescents Health. He is also the Part-time director of the Chinese Center for Disease Control and Prevention School/Child Health Center; Chairman of School Health Professional Committee of National Health Standards Committee; Chairman of Children's Health Branch of Chinese Preventive Medicine Association; Chairman of School Health Supervision Committee of China Health Supervision Association, etc., Chairman Teaching Steering Committee of the National Primary and Secondary School Health Education of the Ministry of Education; in the first batch of members of the Health China Action Expert Advisory Committee and the director of the Preparation and Approval Committee of Children's and School Health Terms of the National Public Health and Preventive Medicine Terminology Preparation Committee. As the first member, he won the 11th Song Qingling Pediatric Medicine Award and the first prize of Science and Technology Award of Chinese Preventive Medicine Association in 2019. His main research directions include the following: The growth and development of children and adolescents and its influencing factors, early prevention of adult diseases and disease prevention, and school health management.