First, Xixia was founded. During the Xixia period, the Black Water City was an important production base and defensive fortress, where the Jin Dynasty set up an ambush? Yanjun Temple in Heishui Town? Responsible for maintaining the security and public order of Heishui City. Black Water City is divided into East and West. There are official buildings, temples and other buildings in Xicheng, which are mainly used for handling affairs and holding religious activities. In Dongcheng, most of them are residential buildings and warehouses, where officials and residents live.
At that time, the Black Water City was not a desert, but an oasis. Before the founding of the Tangut, there were many residents in Black Water City. After the founding of Xixia, a large number of residents moved in, which further promoted the development of economy and culture. In the end, Black Water City became a trading place, where nomads and locals exchanged goods, and thus derived a unique Juyan culture.
Second, the Yuan Dynasty. In A.D. 1226, Mongolian cavalry occupied Heishui City, and then occupied Zhongxing House, the capital of Xixia, and Xixia perished. Although Xixia perished, the Black Water City still exists, which is an important passage to the western regions and Mobei, so the rulers of the Yuan Dynasty stationed a large number of troops here to guard the Black Water City. Not only that, the rulers of the Yuan Dynasty also expanded the Black Water City on a large scale, strengthened fortifications and expanded the urban area. Later, many Han and Mongolian people moved here from other areas to engage in agricultural production. After gradual development, the infrastructure of Black Water City has gradually improved, such as universities, commercial streets, restaurants, government agencies, etc., and has become a political, economic and cultural center. Unfortunately, the prosperity of Black Water City did not last long. At around 1350, the Black Water City was buried in the desert, and the prosperity of the past stayed in the past forever.