《魏书·列传·卷七十九》
侍中、黄门、国子祭酒等有关部门一个月进行一次监察，评议深奥疑难的问题，以期不至于产生纰漏谬误。
侍中、黄门、国子祭酒一月一监，评议疑隐，庶无纰缪。
The relevant departments, such as the Attendant at the Imperial Audience, the Yellow Gate, and the Grand Master of the Imperial Academy, will conduct inspections once a month and discuss profound and difficult issues in order to avoid errors and omissions.