1, Sun Simiao: Sun Simiao was a famous doctor in Tang Dynasty, known as the King of Medicine. I visited Qingcheng Mountain in Chengdu in my later years and found that there are abundant vegetation, including many rare medicinal materials. So he studied pharmacy when he was practicing medicine in Yaowangshan of Taiping Heavenly Kingdom, and finished his important medical and pharmaceutical book "Daughter Fang Yi".

2. Tang Shenwei: Tang Shenwei was born in a medical family. He liked reading since he was a child. He dabbles in various books, such as biographies and Buddhist scriptures. In the period, invited by Shu Duan, he went to Chengdu to practice medicine and then settled in Chengdu.