At the beginning of Zhenguan, under the leadership of Emperor Taizong, the monarch and ministers were in harmony, the whole country was United as one, and the economy improved rapidly. In the Zhenguan period of 1989, cattle and horses were everywhere, and the people were well-fed and well-fed, and the roads were not picked up at night, which was a prosperous scene of peace and prosperity. Emperor Taizong was in office for more than 20 years, and more than 30 officials remonstrated. Among them, Minister Wei Zhi's advice reached more than 200 pieces with hundreds of thousands of words, all of which hit the nail on the head and were very helpful for improving state affairs. Emperor Taizong attached great importance to the selection of talents and strictly followed the principle of having both ability and political integrity. Emperor Taizong believes that only by selecting a large number of people with real talents and practical learning can we achieve great harmony in the world. Therefore, he was thirsty for talents, and issued five imperial edicts for seeking talents, and increased the subjects of imperial examinations, expanding the scope and number of candidates, so as to expose more talents. Because Emperor Taizong attached importance to talents, a large number of outstanding talents emerged in Zhenguan period, which can be described as "talents with both civil and military skills". It is these talents who, with their intelligence, have made great contributions to the formation of "Zhenguan rule". Emperor Taizong attached great importance to the rule of law. He once said: "The national law is not the law of the emperor alone, but the law that everyone in the world must abide by, so everything must obey the law." After the promulgation of the law, Emperor Taizong set an example and took the lead in obeying the law, thus maintaining the unity and stability of the law. During the Zhenguan period, the prince really broke the law and shared the crime with the people. When enforcing the law, he was impartial, but when sentencing, Taizong thought twice and was cautious. He said: "People can't be resurrected after death, and law enforcement must be combined with leniency and severity." Due to the painstaking efforts of Emperor Taizong, the legal system was very good during the Zhenguan period, and few people were sentenced to death for breaking the law. According to the records of Zhenguan for three years, only 29 people were sentenced to death, which almost reached the highest standard of feudal society and legal system-"criminal measures" can be exempted from punishment. People-oriented thinking, open the way and open the mind that is easy to be trained; Reuse talents and appoint people on their merits is the criterion; Impatience and selflessness, and the tolerance of doing things according to law; It constitutes the basic characteristics of Zhenguan rule and becomes the best example of feudal rule. Compared with the western countries at that time, the Tang Dynasty was at the forefront of the world in politics, economy and culture.