Establish the system of three officials and nine ministers in Qin Dynasty. The county system is popularized throughout the country.

The system of internal and external dynasties in the western han dynasty. Parallel county and township system

Six-department system in three provinces in Sui and Tang Dynasties. Appoint a special envoy

Shen Song knew the political affairs and three ministers of the Tang Dynasty. Take over the military power and appoint a civilian as a local governor.