Answer:
Mandate of Heaven.
Step-by-step explanation:
This is a Chinese political and religious doctrine. This was used to justify the ruler power, it was said that He was the Son of Heaven. In case that the ruler was overthrown, this was interpreted by people as no worthy of Heaven's power. Also, natural disasters, lacking of goods, all these was justified as a Heaven's punishment.
So, at the end, Chinese society was unified with religious doctrines.