bet365 Play online games High-intensity farming during the Han and Tang Dynasties、Overloaded animal husbandry and changes in the natural environment，As a result, it was difficult for strong nomadic forces to arise in the north and south of Yinshan Mountain after the mid-Tang Dynasty，The north and south of Yanshan have experienced long-term cultural integration and joint development of various ethnic groups，Become the new political center of the northern nomadic regime。At the same time as the center of the nomadic regime shifted from east to west，The political center of the Central Plains Farming Dynasty also moved eastward from the Guanzhong Plain to Luoyang、Kaifeng area，The geographical pattern of the political center of gravity of the agricultural and pastoral regime forms two successive axes of north-south interaction and integration: "Yinshan-Guanzhong" and "Yanshan-Central Plains"。Under these two axes of integration corresponding to north and south，Successive dynasties have made long-term explorations to realize the construction of a "grand unification" that spans the two major regions of agriculture and animal husbandry。After Liao Dynasty，The north and south of Yanshan Mountain are located in the interactive zone of agricultural and pastoral areas，Become a promoter of the integration of agricultural and pastoral areas、Key areas to achieve “grand unification” national construction。

　　Keywords:Nomadic regime Yinshan Yanshan geographical features  North-South integration

　AuthorLiu Zhuangzhuang，Assistant Researcher at the Institute of Ethnology and Anthropology, Chinese Academy of Social Sciences (Beijing 100081)。