《史记·三十世家·五宗世家》
胶西于王刘端在孝景帝前元三年吴、楚六国反叛被击败后，以皇子的身份受封为胶西王。
胶西于王端，以孝景前三年吴楚七国反破後，端用皇子为胶西王。
Liu Duan, the king of Jiaoxi Yu, was enfeoffed as the king of Jiaoxi with the status of a prince after the defeat of the rebellion of the six countries of Wu and Chu in the third year of Emperor Xiaowu.