Emperor Taizong of the Tang Dynasty believed that the most important thing about being a king is to put the people first.

Emperor Taizong of the Tang Dynasty once said: "The way to be a king must first preserve the people. If you harm the people in order to sacrifice your body, it is like cutting off your legs and eating your belly. If you are full, you will die." ("Zhenguan Zhengyao Volume 1"), which means

: As a monarch, you must first protect the people. If you exploit the people to support yourself, it is like cutting off the flesh from your own thighs to fill your stomach. In the end, when your stomach is full, the person will die.

Extended meaning: The first level of meaning is that the first priority of a king is to preserve the people. If you ignore the people and enrich yourself, the country may be very wealthy. The king has gold mountains, officials have silver treasury, and the bureaucrats have a big belly, but the people who support the officials have a yellow and thin complexion.

, suffers from aplastic anemia and loses hematopoietic function, leading to "death from full stomach".

During the Zhenguan period, under the governance of Li Shimin, the society did not close its doors at night and did not pick up lost things.

In the fourth year of Zhenguan (630), there were only 29 prisoners sentenced to death nationwide.

In the sixth year of Zhenguan (632), the number of death row prisoners increased to 290.

At the end of the year, Li Shimin allowed them to go home to take care of funeral arrangements, and they would die if they came back in the autumn of the seventh year of Zhenguan (633) (in ancient times, they were executed in autumn).

In September of the seventh year of Zhenguan (633), all 290 prisoners were returned and no one escaped.

At that time, China's politics were well-established, officials performed their duties, people lived and worked in peace and contentment, there were fewer injustices, and there was not much resentment in the hearts of the Chinese people.

People who are well-fed and well-fed will not take desperate risks to survive; people with a peaceful mind are less likely to go to extremes, so the probability of committing crimes is very small.

Extended information: Emperor Taizong of the Tang Dynasty’s wise measures: 1. Emperor Taizong of the Tang Dynasty attached great importance to the development of production and reduced the taxes and labor of farmers.

2. Emperor Taizong of the Tang Dynasty paid attention to "abstaining from extravagance and keeping simplicity" and restrained his desire for enjoyment.

3. Merge prefectures and counties and rectify official administration.

4. Emperor Taizong of the Tang Dynasty paid attention to appointing talented people and accepting advice with an open mind.