After Emperor Taizong pacified the Turks, the leaders of ethnic minorities applied to Emperor Taizong for opening a city in order to report the local situation to him. The significance lies in making the centralization of power in the Tang Dynasty more stable, at the same time facilitating business travel, promoting exchanges between ethnic groups and promoting the development of a unified multi-ethnic country.

Understand the important concepts of proposition intention and test site location, and investigate the ethnic relations in ancient Tang Dynasty in China.

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