Xu Fu, named Jun Fang, was a famous alchemist and Taoist celebrity in Qin Dynasty. He used to be the physician of Qin Shihuang and a native of Qi during the Warring States Period. Xu Fu wrote that there are three fairy mountains in the sea, Penglai, Abbot and Yingzhou, where immortals live. So Qin Shihuang sent Xu Fu to lead thousands of boys and girls, as well as three years of food, clothing, shoes, socks, medicines and farm tools to take a mirage to seek immortality, which cost a lot of money. However, Xu Fu led many people out to sea for several years, but he didn't find the holy mountain. Xu Fu left his descendants in the local mountain-"Laoshan Mountain", which was renamed Lao or Lao.
In 2 10 BC, Xu Fu led his troops out to sea again and came to "Guangze Plain". He felt that the local climate was warm, the scenery was beautiful and the people were friendly, so he stopped being king, taught the local people the methods of farming, fishing, whaling and paper arrangement, and never returned to China. There is also a mainstream saying that Xu Fu died in the sea.