What was the state rule in ancient China like?

The topic is not rigorous, it should be: divide the rule of western countries into three types.

China is very simple: slaves in Xia, Shang and Zhou Dynasties were feudal, and emperors after Qin Dynasty were feudal.

I guess you will wonder why there are two feudalism. Yes, there is a difference between the two.

The former is to seal the country (big and small princes) (planting trees on both sides of the border between countries), while the latter is under the unified system, with the emperor or imperial power as the sole ruler.