Since the middle Tang Dynasty, the political and economic crisis has made education unable to return to the old views of Zhenguan, Kaiyuan and Tianbao. In the early years of Tang Daizong's administration, he clearly wrote an imperial edict that "military service is the first priority of state affairs". As a tribute, stop, not to mention school education. Especially after the "An Shi Rebellion", the school buildings in many places were destroyed by the garrison, which attracted the attention of many people of insight. In the second year of Yongtai (766), Xiao Xin, a imperial academy, wrote a letter suggesting that the imperial court "worship Confucianism and be eager to learn, so as to correct the teaching style." On this basis, Dai Zong made the following system: "the rule is the same, and the teacher's home is the best;" If you turn it into a custom, you must learn. ..... Let brother, who is out of the question, is more dangerous and eager to escape. imperial academy is empty and there is not much cover for students. The land of string songs is lonely and silent; It is almost impossible to sweep between letters, so it is very useful to go up here. " In Dai's view, Fuxing school must mobilize the enthusiasm of officials at all levels and relevant people. So he decreed that all roads and festivals should be guarded and children should not be allowed to enter the capital. Those children of prime ministers, officials, six armies and generals who want to enter the capital can make up for it from students all over the country. Government officials who wish to enter the school can agree to it themselves. After a period of hard work, schools in Guo Zi have basically recovered, equipped with facilities, such as ancestral halls, discussion halls, six halls, and official residences.