Three Kingdoms Wei's theory of health preservation: "Therefore, Shennong said that those who take medicine to nourish their lives and Chinese medicine to nourish their nature are really know life's principles, because they are supplemented." Jin Zhanghua's "Natural History" Volume 7: "Chinese medicine nourishes nature, which means that lovesickness is angry and day lilies forget their worries." Song Xuxuan's poem "Temple" said: "Chang Jie is sick, suspicious of Chinese medicine, and intends to seek truth and help each other." 2. Among Chinese medicine, plants are the most.

Working people in China have gradually accumulated rich medical knowledge through practice and continuous understanding in the process of fighting diseases for thousands of years. Due to the lack of Archean characters, this knowledge can only be dictated by teachers. Later, with words, it was gradually recorded.

There are medical books. These books have played a role in summing up the experience of predecessors and facilitating their circulation and promotion. China's medicine has a history of thousands of years, which is a very rich summary of our people's long-term struggle against diseases and has made great contributions to the prosperity of the Chinese nation. Because herbs account for the majority of medicines, books that record medicines are called "materia medica". According to research, during the Qin and Han dynasties, there were many herbal medicines, but unfortunately they were all lost and could not be found. The earliest known herbal work is called Shennong Herbal Classic, and the author is unknown. According to the place names recorded in it, it may have been revised by doctors in the Eastern Han Dynasty. Shennong Materia Medica has three volumes of Shennong Materia Medica Classic, which contains 365 kinds of medicines such as animals, plants and minerals. Each drug has its own characteristics, functions and indications. Another orderly example briefly describes the basic theory of medication, such as toxicity, four qi and five flavors, compatibility, medication methods and dosage forms such as pills, powders, ointments and wine. During the Northern and Southern Dynasties, Tao Hongjing in the Liang Dynasty (452-536 AD) compiled and supplemented Shennong's Herbal Classics, adding 365 kinds of drugs used by famous doctors below the Han and Wei Dynasties, which was called "A Record of Famous Doctors". Each medicine not only supplements the original flavor, function and indications, but also increases the origin, collection time and processing method, which greatly enriches the content of Shennong Herbal Classic. In the Tang Dynasty, due to the development of productive forces and the increasingly frequent external traffic, the government appointed Li Ji and others to preside over the revision of the Classic of Materia Medica Annotated by Dow, calling it "Tang Materia Medica", and then ordered Su Jing and others to revise it again, adding 1 14 drugs, which were promulgated in the fourth year of Xianqing (AD 659) and called "new revision". In order to adapt to Tang Xin Materia Medica, this book was revised and promulgated by the then government, which can be said to be the earliest pharmacopoeia in China and even in the world. This "Materia Medica" contains 844 kinds of drugs, with drug maps attached, which is a precedent for graphic comparison of traditional Chinese medicine works. It not only had a great influence on the development of pharmacology in China, but also spread abroad soon. It has made important contributions to the development of world medicine. The above is a three-point summary of China's ancient drug knowledge. Since then, due to the continuous enrichment of drug knowledge, new summaries will appear every once in a while. For example, Kaibao Materia Medica and Jiayou Supplementary Notes Materia Medica in Song Dynasty are all summative. At the end of the Northern Song Dynasty, Tang Shenwei, a doctor of traditional Chinese medicine in Shu, compiled Emergency Materia Medica with Historical Evidence. He combined Jiayou Buzhu Materia Medica with Illustrated Materia Medica, added more than 500 kinds of drugs, collected many doctors' and folk prescriptions, and supplemented a large number of drug materials obtained from historical documents, making the book more substantial in content and complete in style. The government sent someone to revise it three times, adding the titles of Daguan, Zhenghe and Shaoxing. Li Shizhen (A.D. 15 18 ~ 1593), a great medical scientist in the Ming Dynasty, made a thorough revision on the basis of Zheng Bencao and compiled a Compendium of Materia Medica that met the needs of the times. This book contains 1892 kinds of drugs and has more than 1 1000 prescriptions.