Tang Set Xizhou To Explore

The dissertation's main study object is Xi state, which was set up in Turfan Basin in early days of Tang Dynasty. On the basis of consulting lots of historical material, I attempt to analyze the reason and condition of Xi state's setting in early days in Tang Dynasty according to the following four aspects:First, the major policy to Qoco Kingdom and debates between Tang Taizong and his courtiers. It includes two aspects: one is the debate about dispatch troops to Qoco Kingdom; the other is the debate about how to father Qoco Kingdom. I analyze the focus and essential of the debate and I think that essential of the debate's is if to deal in the Northwest Area in Tang Dynasty in order to safeguard the Silk Road. Second, the question about the Xichang state. I think that Xichang state didn't exist in Tang Dynasty. Third, I analyze the historical tradition, economy condition and military affairs of Turfan Area. The Gaochang Area has several advantages: such as centuries-old history tradition of Han folk, the principal part inhabitants of this area were Han folks, the traditional agriculture production and the developed agriculture economy, and so on. The important military condition and location can suffice the demands of the Tang Dynasty which to safeguard the Silk Road. Forth, I analyze the significance and influence of the Xi state's setting in Turfan basin in Tang Dynasty.In a word, I think that the Xi state' setting has the important significance and influence of the control policy about borderland in Tang Dynasty.The substance of this paper is to summarize the historical experience and lesson in order to providing some reference for today's control policy of borderland.