1: Advocating Confucianism and learning. In order to meet the needs of governing the country, Emperor Wendi of Sui Dynasty began to set up schools. After Yang Di succeeded to the throne, he followed his father to govern the country with Confucianism. In the Tang Dynasty, the dominant position of Confucianism was re-established. There are three main points: selecting officials to study classics, cultivating Confucian talents and unifying Confucianism.

2. Buddhism and Taoism Both Emperor Wendi and Wu Zetian used Buddhism to govern the people spiritually, which promoted the development of China culture.

3. Establishing and Perfecting the Imperial Examination System In 606, the imperial examination system was established in the Sui Dynasty, and the imperial examination system was successfully established in Volume 36 of Mirror Compendium. The imperial examination system in the Tang Dynasty was improved in the following four aspects: students, ways of applying for examinations, subjects and methods of examinations.

Influence on later generations: The appearance of the imperial examination system expanded the ruling foundation of the ruling class, and the imperial examination system has been used for more than 300 years.