During the Sui and Tang Dynasties, the cultural and educational policy of advocating Confucianism was mainly to promote the development of school education. In particular, the establishment of the imperial examination system is a great progress of the feudal official selection system. It broke through the situation that aristocratic families monopolized official career, expanded the source of officials, improved the cultural quality of officials and greatly strengthened centralization. Therefore, this system has been used by all dynasties and has far-reaching influence.