The Han Dynasty continued to establish a centralized country and inherited the Qin system, which was the earliest era of centralization in ancient China. During the reign of Qin Xiaogong, the State of Qin adopted Shang Yang's political and economic reform, which laid a political, economic and social foundation for the later reunification of Qin. A series of suggestions put forward by Shang Yang, such as moving the capital to Xianyang, implementing the county system, opening up a new situation, attaching importance to the law, emphasizing agriculture and restraining commerce, and standardizing weights and measures, were adopted. These measures are conducive to the integration and development of Qin State, so as to make Qiang Bing a rich country, lay a solid foundation and show its strength when sweeping the six countries.

At the same time, after unifying the world, Qin was not carried away by victory and stopped the pace of reform. Instead, we should continue to improve the reform before Shang Yang and continue to implement the county system in order to better realize centralization and prevent local differentiation. The unification of characters and the appearance of Xiao Zhuan promoted the unification of national ideology and culture and politics. In order to better consolidate the rule, build post roads, build the Great Wall, reduce foreign aggression and strengthen local control. Since Shang Yang's political reform in Qin Dynasty, legalism has been injected, and heavy punishment is profound. Qin Shihuang had Lisi, and his legalist thoughts were deeply rooted. Reese suggested burning books, which disrupted the situation of a hundred schools of thought contending and suppressed the legalist thought.

Due to the new construction of the Qin Dynasty, the wars in the Spring and Autumn Period and the Warring States Period caused turmoil in various places, and the agricultural harvest was unstable. In order to publicize his contribution to national reunification, Qin Shihuang needed a lot of material and financial resources to build large-scale buildings, Epang Palace, the Great Wall and water conservancy projects. The people are exhausted by the war, overwhelmed by the harsh laws, and are under great pressure physically and mentally. When they can't stand it, it is the time when passers-by in the world rebel. Qin's feat of unifying the six countries was touching. The Qin dynasty was overthrown during the reign of the second emperor, and the brilliant fireworks disappeared in the air for a few seconds. The forces of the Qin dynasty also bloomed its brilliance in the short history.

There is no denying that the rulers of the Qin Dynasty did have many problems, which led to the death of Qin Ershi. However, it should not be ignored that Qin's measures to govern the country have shaped a template for the Han Dynasty and even other dynasties, which is conducive to national integration and forms a situation of centralization and ruling the world. This is why the early Han dynasty chose the development strategy of inheriting Qin system from Han dynasty.