Shennong clan is said to be the leader of ancient tribal alliance, also known as Shennong tribe. According to the relevant documents of Han Dynasty and Pre-Qin Dynasty, combined with the unearthed cultural relics, it can be preliminarily inferred that Shennong tribes existed both in the south and north in the ancient legendary era. As quoted in Biography of Five Emperors in Historical Records(Variorum), Emperor Yan was a descendant of Shennong family. Ganqing, Baoji, Huaiyang, Qufu and Suizhou are all considered to be the birthplace of Emperor Yan. Through literature review and unearthed cultural relics, Lishan town in Suizhou city is the most reliable.