Who is the prototype of Yun Zhongjun, the patriarch of Yin and Yang in history?

In history, this man is Xu Fu, ranking first among the elders of the Yin and Yang Family in Yunzhong Army, and the first of the five elders of the Yin and Yang Family (tied with, Shao Siming, and Mrs. Xiang), who is in charge of the Golden Department of the Five Elements Sect. He is obsessed with the art of Dan medicine and has made small achievements. He once cured the migraine of Qin Shihuang, so he was highly valued by Qin Shihuang who wanted to live forever. He described the fairy tales of overseas fairy mountains to Qin Shihuang. As a result, the Daqin Empire collected a large sum of money and spent many years building a huge ship "Phantom", and appointed Jun in the cloud as the owner of the Phantom.

Personal data:

Xu Fu, named Jun Fang, was a famous alchemist in the Qin Dynasty. He once worked as a physician for Qin Shihuang. He was born in Qi during the Warring States Period. During Qin Shihuang's reign, Xu Fu led 3,000 boys and girls to cross the coast of Shandong and traveled all over Korea and Japan, which became a much-told story in the cultural exchanges between China, Japan and South Korea in history. It has been a hot topic for people to study and discuss for thousands of years, and has become a comprehensive study of pre-Qin history, Qin and Han history, Sino-foreign relations history, navigation history, folklore, religion, archaeology and other disciplines, which has extremely important academic value.