Old is Yongzhou Gansu provincial capital Lanzhou. Located in the upper Yellow River, located in the geographical center of China, between latitude 32 ° 31 '~ 42 ° 57', longitude 92 ° 13 '~ 108 ° 46' between. It is the east, Shaanxi, Qinghai, Sichuan controlled South, West Hill Xinjiang, brief Inner Mongolia, Ningxia...