1. As can be seen from the first material, Emperor Taizong realized that people are the creators of history. Emperor Taizong realized that the relationship between the monarch and the people was like a ship. To maintain his rule, the people had to survive. Because Emperor Taizong learned the lesson of Sui death.

2. It embodies the ruling style of Emperor Taizong, who is good at learning from history, employing people, being open-minded and coachable, and being brave in reform.

3. Measures: knowing people and being good at their duties, implementing the system of equal land, neglecting thin taxes, people-oriented thinking, improving the imperial examination system, national unity and the open policy.

Compromise policy

Achievements: The political clarity, social stability and economic recovery in the Tang Dynasty led to the situation of "chastity rule".