《后汉书·列传·宣张二王杜郭吴承郑赵》
建和初，四府表荐，征拜为议郎，侍讲宫中，再迁为侍中。
建和初，四府表荐，征拜为议郎，侍讲宫中，再迁为侍中。
At the beginning of the Jianhe era, he was recommended by the Four Bureaus and was appointed as a yilang. He served as a tutor in the palace and was later promoted to the position of shizhong.