Le Xianyang (1630—1688) is one of the founders of Beijing Tongrentang. He worked in the Palace Hospital during the reign of Kangxi in Qing Dynasty, and used his knowledge to cure diseases and save lives. Later, he left the Forbidden City Hospital and founded Tongrentang Pharmacy in Beijing. Pharmacy was originally a small workshop-style pharmaceutical factory, and with the passage of time and business development, it has become one of the famous Chinese patent medicine brands in China.