1, alchemist. In ancient times, people who claimed to be able to visit the immortal alchemy in order to live forever.

2. The official name of the Zhou Dynasty. Imperial City Sifang is responsible for the prison proceedings of land expropriation.

3, generally refers to people engaged in medicine, medicine, satellite and similar occupations.

A person who worships divination and advocates alchemy. Historical Records of Qin Shihuang: "The alchemist wants to be refined into a wonderful medicine." It appeared not later than the Zhou Dynasty, flourished in the Qin and Han Dynasties, and gradually formed a special group of alchemists, the so-called Fang or Xianfu. There are also different factions, breathing, eating fairy medicine, temple alchemy, calling gods to disintegrate ghosts. The immortal thought and its magic became the core content and spiritual pillar of Taoism in later generations.

Fang's warlock, that is, and. In ancient times, it was called "Taoist doctor" and "alchemist doctor". People who are Taoist must also learn medical skills. Ge Hong's "Bao Puzi" said: "Those who were Taoists at the beginning of ancient times must learn medical skills to save modern times." Or "preaching by doctors" or "preaching by doctors", or "assisting doctors to enter Taoism" or "assisting immortals to enter medicine", there are theories of "homology of medicine and Taoism" and "communication of medicine and Taoism".

Famous doctors of past dynasties, such as Dong Feng in Han Dynasty, Ge Hong in Jin Dynasty, Tao Hongjing in Northern and Southern Dynasties, Bing Wang and Yang Shangshan in Tang Dynasty, were all Taoist doctors. During the Western Zhou Dynasty, judicial officials were set up in townships, prefectures, counties, prefectures and cities to try criminal and civil cases in various regions.