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.
Xigu, Lanzhou area, located in the west gate of Lanzhou City, is the core industrial zone of Gansu Province and Lanzhou City, and the largest petrochemical base in western China. The region has a total area of 385 square kilometers and has jurisdiction over 40 administrative villages, 8 streets and 70 communities in 5 towns and 1 township. In 2015, the region's GDP reached 29.781 billion yuan. Xigu District has become one of the areas with the densest factors of production in the western region. It has won the titles of "National Spark Program Advanced County", "National Science and Technology Progress County", "National Science Popularization demonstration District", "National Cultural Advanced County", "National Family Planning Advanced County and District", Gansu Province double support Model City "six consecutive championships" and so on.