Zang Tu to assist Xiang Yu, the king of Chu, in his war against Qin. When Zang Tu returned, Han Guang was ordered to become King of Liaodong instead. When Han Guang refused, Zang Tu killed him and declared himself king of both Yan and Liaodong.

Zang Tu submitted Yan to the Han dynasty during the war between Han and Chu in order to keep his title, but once the war was finished he revolted. Liu