It is located at the foot of the Flaming Mountain, about 46 kilometers southeast of Turpan. The ancient city of Gaochang, and the ancient city of Jiaohe, are the best-preserved ruins of the ancient cities in China. The city was initially built as a garrison town in the first century B.C., called Gaochang Wall, and later renamed Kharakhoja, Kocho or King City. It was a key point along the Silk Road. [Photo/CFP]