不管是研究历史时期经济、文化、人口抑或其他要素的地理变化状况,其基础与研究成果的最终反映都要落实到地图上来,而若要绘制出历史时期上述要素的地理变化均需要同时期的政区地图作为基本的底图。然而,由于中国历史时期政区演变的频繁以及遗存资料不全等原因,若要完整地搞清楚历史时期中国政区的演变过程却是一件相当不易的事情,特别是对于一些时间跨度较长的朝代,则更为不易。以唐朝为 Regardless of the historical changes in the economic, cultural, demographic or other elements of the historical period, the final reflection of its foundations and research results must be implemented on the map. However, if it is necessary to draw the historical changes of these elements in the same period Administrative map as the basic base map. However, due to the frequent evolution of political districts in China's history and the incomplete information, it is quite difficult to fully understand the evolution of the political regions in China during the historical period. This is especially true for some time-lapse Dynasty, it is more difficult. To the Tang Dynasty