At the beginning of the Han Dynasty, following the legacy of the Warring States, princes and kings recruited more guests to raise scholars, and the recruits were not limited to Confucian scholars. From the beginning of Emperor Wu, Dong Zhongshu's suggestion was adopted, and Confucianism was advocated, "decorating official business with Confucian classics", so Confucianism was combined with official career. The state has set up too much knowledge to train scholars, and scholars also encourage themselves with "learning". Therefore, there is a saying in society that "it is better to leave a full child once". The prosperity of Confucian classics promoted the development of school education. In the Eastern Han Dynasty, in Du Dong Fu, Ban Gu praised its grand occasion with "the school is like a forest and the steps are full". Throughout the Han dynasty, the academic system is divided into official schools and local official schools; Private schools are divided into teachers' lectures and libraries.