What was the mainstream of ethnic relations in the prosperous Tang Dynasty?

In the prosperous Tang Dynasty, the mainstream of ethnic relations was great integration and development, and the exchanges between ethnic groups were strengthened (including economy and culture).

From the ancient ethnic relations in China? Historically, the Han nationality and ethnic minorities have learned from each other and absorbed from each other in long-term close economic and cultural exchanges, and it has long been formed that the Han nationality is inseparable from ethnic minorities, and ethnic minorities are also inseparable from the internal relations of the Han nationality.

The whole world in the prosperous Tang Dynasty;

America (Maya civilization period) and Australia are still very poor, basically still in the primitive society stage, Africa is still in the period of ignorance except Egypt, and the Korean Peninsula and Japan in Asia have not really formed countries, basically belonging to the subordinate countries of Datang. At that time, Russia was a gathering place of Huns and a minority in China. The island countries in South Asia were basically tribal gathering places at that time, not a country.