Zhang Zhongjing (about 150 ~ 154—— about 2 15 ~ 2 19), a famous doctor in the late Eastern Han Dynasty, was honored as a medical sage by later generations. Zhang Zhongjing extensively collected medical prescriptions and wrote the masterpiece Treatise on Febrile Diseases handed down from ancient times. The established principle of syndrome differentiation and treatment is the basic principle of TCM clinic and the soul of TCM. In the aspect of prescription science, Treatise on Febrile Diseases has also made great contributions, creating many dosage forms and recording a large number of effective prescriptions. The therapeutic principle of differentiation of six meridians established by him has been highly praised by doctors in past dynasties. Sun Simiao (58 1-682), a native of Jingzhao Huayuan (now Yaozhou District, Tongchuan City, Shaanxi Province) in the Tang Dynasty, was honored as the "King of Medicine" by later generations. In Taibai Mountain, Sun Simiao studied Taoist classics and explored the art of health preservation. At the same time, he also read many medical books and studied ancient medical prescriptions. He chose to "heal the wounded and rescue the dying" as his lifelong career. In order to understand the characteristics of Chinese herbal medicine, he traveled all over the mountains. Sun Simiao also attached great importance to the folk medical experience, constantly accumulated interviews and recorded them in time, and finally completed his immortal book "Thousands of Money". Li Shizhen (15 18- 1593), an ancient China physician, was born in the Ming Dynasty. /kloc-since 0/565, Li Shizhen has traveled all over Wudang Mountain, Lushan Mountain, Maoshan Mountain, Niushou Mountain, Huguang, Anhui, Henan, Hebei and other places, collecting drug specimens and prescriptions, worshiping fishermen, woodcutters, farmers, coachmen, medical workers and snake catchers as teachers, consulting 925 kinds of medical books in past dynasties and recording tens of millions of books.