Chaoji system is that central authority and the place keep one of the system that administration contacts in the earlier stage Tang Dynasty,after ampere of An Shi is messy gradually tend to be abolish.

The tributary system was the main pattern of Sino-foreign relations in ancient China, and it originated from the Pre-Ch in Period.

The tributary system is one of the main Patterns in Sino-foreign relations in ancient China.

“Tributary system”was the traditional foreign policy in ancient China, which carried out the diplomatic strategy to build the mutual benefice and make friends with neighbor countries each other.

The core of overseas policies of the early Ming Imperial Court mirrored in the period of Zheng He s expeditions are the tribute system and the ban on maritime trade or relations with foreign countries.