Gan Bao An individual from the Jin Dynasty. In his youth, he was diligent and eager to learn, reading extensively. The "Sou Shen Ji" he wrote is a representative work of the strange tales novels of the Wei and Jin dynasties. Gan Ji A person from the Three Kingdoms era. It is said that he learned Taoist classics from a celestial master and could cure all kinds of diseases and pray for rain. Gan Gui A native of Shuntian in the Ming Dynasty. He passed the imperial examination during the Zhengde period and rose to the position of Inspector - General. He was strict in governance. Wherever he held office, the powerful and wealthy did not dare to act recklessly and their arrogance subsided.

Migration and Distribution According to *Shuowen Jiezi* (Analytical Dictionary of Characters), "It means beautiful. It consists of 'kou' (mouth) containing 'yi' (one). 'One' represents the way. All characters related to 'gan' are under this radical. Pronounced as 'gu san qie'." It can be seen that the Gan surname has its origin in occupation. The ancestors of the Gan surname were ancient wizards who made a living by divination, so the words they spoke were all regarded as "the way". After Huangdi (the Yellow Emperor) defeated Yandi (the Flame Emperor) and Chiyou and unified the world, he used the precious tripod bestowed by heaven to measure the operation laws of the sun, moon, and stars and created the Heavenly Stems and Earthly Branches. He also used the yarrow stalks for divination to calculate the calendar and predict the solar terms and days. He taught the common people to sow all kinds of grains and plants according to the solar terms and to domesticate birds, beasts, fish, and insects. Huangdi entrusted the important task of managing astronomy, calendar, and divination to his thirteenth son and enfeoffed him in Gan. Later, as his descendants multiplied, they took the name of the state as their surname, becoming the ancestors of the Gan surname, who were engaged in the study of astronomy, calendar, and divination.