The earliest pharmacological monograph "Shen Nong Ben Cao Jing" appeared in Han Dynasty. The book contains 365 kinds of drugs, which have been written by many doctors. During the Tang and Song Dynasties, the imperial court organized a special person to sort out and revise the books on Chinese pharmacy. Masterpiece: Shennong's Classic of Materia Medica is the earliest existing pharmaceutical monograph in China.

Author: This book was not written by one person at a time, but has been enriched and perfected for a long time.

Date of completion: although the specific date of completion is still controversial, it will not be later than the second century AD.

Number of drugs carried: 365 kinds.

Version: The original book of Benjing was lost earlier, and the current version has been compiled by scholars since Ming and Qing Dynasties.

Main content and academic value:

1. In the "Preface" part, the differences of drugs such as four gases and five flavors, toxicity and non-toxicity, health care and disease elimination are briefly summarized, and they are divided into three categories, namely "three categories classification".

2. Under each drug, the name correction, nature and taste, indication function and growth environment are introduced in turn, and some drugs are followed by aliases and places of origin.

3. Most of the recording functions of herbs are simple and proven, and they have been used for a long time.

4. This classic systematically summarizes the pharmaceutical achievements before the Han Dynasty, which has a far-reaching impact on the development of materia medica in later generations.