What is the earliest extant Chinese medicine book in China? Brief introduction of the earliest extant books on traditional Chinese medicine in China.

1. The earliest monograph on traditional Chinese medicine in China is Shennong's Herbal Classic, or Benjing for short. Unknown author, written in Qin and Han Dynasties. There are 365 kinds of drugs recorded in the book, which are divided into top grade, middle grade and inferior grade. The original book has long been lost. In the Southern Dynasties, Tao Hongjing annotated Shennong's Classic of Materia Medica, supplemented Bielu, a famous doctor, and compiled seven volumes of Notes on Materia Medica, increasing the variety of drugs to more than 730.

2. Shennong Materia Medica systematically summarizes the experience of ancient physicians in drug use, and comprehensively and systematically sorts out the drug knowledge that has been mastered. The book contains 365 kinds of drugs, which is consistent with 365 days a year. This is not a coincidence, but the result of the author's intention. In fact, the number of drugs mastered at that time had far exceeded this figure. However, due to the influence of mathematical skills, 365 drugs were selected. "The method is 365 degrees. Once it should be one day, it will be one year old."

3. Shennong's Classic of Materia Medica not only collects drugs, but also consciously classifies the collected drugs, and divides 365 kinds of drugs into three categories according to the top, middle and bottom, which is called "three-product classification". Classification is mainly based on the performance and efficacy of drugs.