《北史·列传·卷七十七》
冀州刺史赵举荐他，隋文帝征召授予他云骑尉，辅助太史，参与谋议律令历法方面的事务。
冀州刺史赵煚荐之，隋文帝征授云骑尉，直太史，参议律历事。
The governor of Jizhou, Zhao, recommended him, and Emperor Wen of Sui summoned him to confer upon him the title of Cloud Cavalry Lieutenant, and to assist the chief court astrologer in participating in deliberations on laws and the calendar.