Qin Shihuang established the emperor system in the central government, implemented three officials and nine ministers, and managed state affairs. The enfeoffment system was abolished at the local level and replaced by the county system. At the same time, books are written in the same language and cars are on the same track. Unified measurement. Attacking Xiongnu in the north, conquering Baiyue in the south, building the Great Wall of Wan Li, building Lingqu and connecting the water system. It also pushed China into the era of great unification and created a new situation for the establishment of authoritarian centralization. It has had a far-reaching impact on China and world history, and laid the basic pattern of China's political system for more than two thousand years. Li Zhi, a thinker in the Ming Dynasty, praised him as "an emperor through the ages".