Colorado Springs is a home rule municipality in, and the county seat of, El Paso County, Colorado, United States. It is the largest city in El Paso County, with a population of 478,961 at the 2020 United States Census, a 15.02% increase since 2010. Colorado Springs is the second-most populous city and the most extensive city in the state of Colorado, and the 40th-most populous city in the United States. It is the principal city of the Colorado Springs metropolitan area and the second-most prominent city of the Front Range Urban Corridor. It is located in east-central Colorado, on Fountain Creek, 70 miles (113 km) south of Denver.
Qilian County, which belongs to Haibei Tibetan Autonomous Prefecture of Qinghai Province, gets its name because it is located in the hinterland of the middle part of Qilian Mountains. It is adjacent to the Gansu Hexi Corridor, the primary passage of the ancient Silk Road, to the north, so it is known as the "north gate" of Qinghai. Qilian County covers an area of 14000 square kilometers, accounting for 41% of the total land area of the whole state. It has jurisdiction over 45 administrative villages in 4 townships and 3 towns, with a total population of 50,000 as of 2013, with 15 ethnic groups, including Han, Tibetan, Mongolian and Hui, with ethnic minorities accounting for 79.2% of the population. The average elevation in the territory is 3169 meters, the county seat is 2787 meters above sea level, the annual average temperature is 1 ℃, and the annual precipitation is about 420mm, which is a typical plateau continental climate. Qilian is an important resource-rich area in Qinghai Province. A variety of mineral resources, known as "China's Ural", is a key county in the development of resources in the province. "Qilian" system