In order to achieve "peace and tranquility", we must reduce the complexity, first save the people, "live and work in peace and contentment" and let them "have their own careers". Li Shimin implemented the policy of "tax saving" and "people-oriented", trying to reduce the burden of corvee and tax, so that ordinary people can survive.
He learned from the lessons of history that "profiting from luxury" is the foundation of danger. To this end, at the beginning of Zhenguan, he took a series of measures to practice economy and limit luxury, such as stopping all parties from paying tribute to precious and exotic goods, limiting the construction of palaces, breaking the old custom of heavy burial, and making the funeral system simple. If there is a violation, it will be criminalized according to law. Under his influence, there were many important officials at that time, who generally advocated frugal life and simple style.
At the same time, Li Shimin is more aware of people's sufferings and has taken some corresponding "compassionate" measures. Starting from the idea of "the country is people-oriented", he adopted policies such as "agriculture-oriented", "not robbing the farming season", "sharing interest with the people" and "light tax" while promoting the system of equal land. In order to "not rob the farming season", Li Shimin implemented the "flat rent system", and used flat labor instead of hard labor, so as to minimize the collection of corvees. In order to encourage reclamation, it is stipulated that returning exiled farmers can reduce or exempt taxes, set up voluntary warehouses, and give certain food relief to those in need; In order to promote population proliferation and increase labor force, it is stipulated that young men and women should get married at the right time, widows should be encouraged to remarry, maids should be released to start a family freely, and children sold by farmers due to famine and population plundered by Turks should be redeemed with "imperial treasures"; In order to develop production, some water conservancy projects have been built.