The examination system was popular in the two Han dynasties, Wei, Jin, and Northern and Southern Dynasties. The inspection system selects talents to become officials through the method of inspection and recommendation.

The examination of scripture and morality was more important than the examination of the skills required for the operation of the government, Gong says. The real reason for being examined was that he studied under the master of scripture, Ku Hangeng, in studying the "Book of Poangeng", one of five Confucian classics.