《后汉书·本纪·孝献帝纪》
中平六年四月，少帝刘辩即位，封帝为渤海王，迁封陈留王。
中平六年四月，少帝即位，封帝为勃海王，徙封陈留王。
In the fourth month of the sixth year of the Zhongping period, the young Emperor Liu Bian took the throne, ennobling the Emperor as the King of Bohai and transferring him to be the King of Chenliu.