Zhang Xueliang, director of training center of Chinese Academy of Traditional Chinese Medicine, tutor of master students and chief physician. Member of Health and Rehabilitation Professional Committee of China Association of Integrated Traditional Chinese and Western Medicine, member of Internal Medicine Branch of China Association of Traditional Chinese Medicine, executive director of Beijing Sub-health Prevention Association, and inheritor of academic experience of the second batch of old Chinese medicine experts in China. He studied under the late master typhoid fever and Professor Sun Kong, the grandson of four famous doctors in Beijing.