Li Shizhen, an outstanding pharmacologist in ancient China. (AD 15 18) was born in a doctor's family in Hubei. When I was a teenager, I often went to my father and brother to collect herbs, or copied prescriptions for my father and listened to his explanation of pharmacology. At that time, the imperial examination was popular, and he was a scholar of 14 years old. But he loves medicine and is not interested in stereotyped writing. Therefore, after three failures, Kao Ju-ren gave up the road of becoming an official in the imperial examination and devoted himself to medicine. In the process of practicing medicine, he found that the cursive script at that time was incomplete, with confusing names and full of fallacies. So I made up my mind to write a new cursive script. He made a detailed study of ancient books on materia medica and medicine. For a long time, I went deep into the people to learn from the working people, collected medicinal materials in the deep mountains and forests, and opened up medicinal gardens to cultivate medicinal materials. After 27 years of hard work, he finally wrote the world-famous Compendium of Materia Medica at the age of 6 1. This book not only summarizes the history of China's ancient materia medica, but also systematizes the previous chemical knowledge to a new level of understanding. The book contains 1 892 kinds of drugs, including 266 kinds of inorganic substances. The classification of drugs is more detailed, so some confusing substances are named and corrected.