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西南边疆在两汉时逐渐形成了一个人文地理区域,至蜀汉时形成了南中这一政治地理区域。两者范围重合。之后南中在蜀汉两晋时与高层政区重合同一,并随其范围的变化而变化,而与相对稳定的西南边疆不再重合。这一现象的发生与当时全国政治形势有关。由于政治形势而产生的中原王朝治理边疆区域的战略需要,以及因此而产生的区域划分行为,集中反映在政区特别是高层政区的设置与变迁上,同时政区本身对区域也有固化作用。
The southwestern frontier gradually formed a humanistic geographical area in the Han Dynasty and formed the political and geographical area in the south during the Shuhan Period. The scope of the two overlap. After that, the South and the South coincided with the high-level political districts in the Shuhan and Jin dynasties and changed with the changes of their scopes, but no longer coincided with the relatively stable southwestern frontier. The occurrence of this phenomenon was related to the political situation in the country at the time. The strategic needs of the Central Plains dynasty for the governance of the border areas due to the political situation and the resulting demarcation of areas are concentrated in the setup and changes of the political districts, especially the high-level political districts. At the same time, the political districts themselves have a solidified role in the region.