What is Zhang Zhongjing's life experience and historical evaluation?

At the end of the Eastern Han Dynasty, he was in turmoil, fighting for years, "the people abandoned agriculture", and most of the urban granges became wilderness, and the people were displaced and hungry. Plague broke out continuously in various places, especially in Luoyang and Nanyang, and the epidemic situation in Huiji (Shaoxing) was serious. "Every family has the pain of zombies, and every room has a wail;" Zhang Zhongjing's family is no exception. Zhang Zhongjing witnessed this sad scene. According to records, since the first year of Jian 'an of Emperor Xian of Han Dynasty (AD 196), two-thirds of people died of infectious diseases in ten years, of which typhoid accounted for 70%. "The loss before feeling is hopeless" (Preface to Treatise on Febrile Diseases). Therefore, he worked hard to study medicine and determined to be a doctor who can relieve people's suffering. "In order to cure the diseases of your relatives, to save the poor, to protect your health, and to support your life" (Preface to Treatise on Febrile Diseases). At that time, there was a man in his family named Zhang Bozu, a famous doctor. Zhang Zhongjing went to worship him as a teacher in order to study medicine. Seeing that he was smart and eager to learn, Zhang Bozu taught him his medical knowledge and skills without reservation, but Zhang Zhongjing actually passed it on. He Qing once praised in the book Xiangyang Fu Zhi: "Zhongjing's skill is better than Bozu's".

Zhang Zhongjing assiduously studied Neijing, 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 principle of differential treatment of six meridians established by him has been highly praised by doctors in past dynasties. This is the first medical monograph in China to establish the law of syndrome differentiation and treatment from theory to practice. It is one of the most influential works in the history of Chinese medicine, and it is a necessary classic work for later scholars to study Chinese medicine, which has been widely valued by medical students and clinicians.