Dr. Sun is currently the Director of Medicine at Beijing Yide Hospital. She is also a Professor at Peking University and a Doctoral advisor at Peking Union Medical College Hospital. Before joining Beijing Yide Hospital, she was the deputy head of Endocrinology and Metabolism Department and Nutrition Department in Beijing Hospital. Dr. Sun is a standing committee member and deputy secretary general of the Endocrinology and Metabolism Branch of Chinese Geriatric Medical Association, a council member of CNS and members of Clinical Nutrition Branch and Nutrition and Chronic Disease Control Branch. She has also served on editorial boards of Chinese Journal of Cardiovascular Medicine, and Chinese Journal of Health Management.