Xi'an lies on the Guanzhong Plain in the middle reaches of the Yellow River. It stretches 204 km from east to west and 116 km from north to south, with a total area of 10,097.01 square kilometers. Its urban geological structure spans two major geological units: the Qinling Geosynclinal Fold Belt and the North China Platform. Xi'an has one of China's most dramatic urban elevation differences. The towering ...