Revival of the Southern Route of the Silk Road in the Western Regions in the Tang and Song Dynasties;

Initial Discussion on Xu Song and His Xi Yu Water Way;

First, the thesis points out Tang Dynasty government built up the Western Regions Army consisting mainly of Zhechong mansion of Western state to suppress intrusion in Yutian state, the turmoil started up by unified army of Western Turki Gongyue Clan, Shule State and Tubo, and Tang Dynasty government won at last.