Ulan County was one of the territories of the Tuyuhun and Tuhun ethnic groups,as well as an area which the Qinghai route......

青海乌兰县大南湾遗址试掘简报乌兰县是吐谷浑、吐蕃的主要活动区域之一,也是丝绸之路青海道的必经之路。2000年对乌兰县大南湾遗......