Take the Sui Dynasty as a mirror, take the people as the foundation, and recuperate with the people; Attach importance to morality and be able to do things, be open-minded and be able to be taught; * * * Governance in the relationship between monarch and minister; Combining leniency with severity, simplifying laws and alleviating social contradictions; Open ethnic policy, etc. Emperor Taizong ruled the world with Chinese characters, practiced economy, advised farmers and sang, and initiated the "Zhenguan rule". Open up the territory to the outside world, attack and destroy East Turkistan and Xueyantuo, and hit Koguryo hard. Set up four towns in Anxi so that all ethnic groups in the northern region can live in harmony.

Main ideas 1. Appoint talents

Shortly after Li Shimin ascended the throne, a new library was built according to the model of Qin Literature Museum, which further reserved world literary talents. Li Shimin knows how to perform people's duties well and employs people according to their abilities, regardless of their origins. Fang Lingxuan and Du Ruhui were used in the early stage, and Sun Chang Wuji, Yang Shidao and Chu Suiliang were used in the later stage. They were all honest people. Others, such as Li Ji and Jing Li, are also famous for their generation. In addition, Li Shimin also let bygones be bygones, re-used the old headquarters of Wei Zhi and Wang Gui, and handed over Weichi Gong and took away a large number of talents.

Second, improve the system.

During the reign of Li Shimin, the Sui system became more perfect. For example, the central court continued the system of six departments in three provinces and set up a special government office to facilitate the collegial discussion of politics and contain the three provinces; Locally, it follows the Sui Dynasty county-level system, and the whole country is divided into ten prison areas (roads). In addition, the government's military system includes soldiers in agriculture; The land equalization system, the tenancy adjustment system and the imperial examination system all developed.

Third, give advice.

Li Shimin regarded Yang Di's refusal to remonstrate with national subjugation as a warning. After he acceded to the throne, he tried his best to speak. He expanded the power of admonishing officials and encouraged ministers to criticize his decision-making and style. Among them, Wei Jin remonstrated more than 200 times and told the court about Chen's fault, which made him embarrassed many times in the early years and unable to step down.

Fourth, he loves Haiyan.

During the Zhenguan period, under the governance of Li Shimin, the society did not close at night. At that time, China was politically civilized, officials performed their duties, people lived and worked in peace and contentment, and there were few unfair phenomena, so there was not much resentment in China people's hearts. People who have plenty of food and clothing will not take risks to survive; People with a peaceful mind are not easy to go to extremes, so the probability of committing a crime is very small.