4. Abandoning the enfeoffment system and establishing counties and counties became the standard mode of management after the reunification of China, which lasted for thousands of years;
13. unifying currency and weights and measures will greatly promote domestic business exchanges.
4. The cars are on the same track and the roads are at the same distance. The construction of Qin Zhi Road greatly facilitates domestic traffic;
5. Burn the history books of the six countries, unify thoughts objectively, and avoid splitting the country due to historical problems; However, copies of ancient books destroyed in various countries were preserved, and the subsequent destruction was because Xiang Yu set fire to Qin Dou;