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.
Tacheng: the county-level city under the jurisdiction of Tacheng area of Yili Prefecture, Xinjiang, is located in the northwest of Xinjiang Uygur Autonomous region and the Tacheng basin on the northwest edge of Junggar Basin, with a total area of 4356.6 square kilometers. It is bordered by the Republic of Kazakhstan in the northwest, Emin County in the east and Yumin County in the south. It is 530 kilometers to the east from Urumqi, the capital of the autonomous region, and only 12 kilometers to the west from the first-class national port, Baktu Port. It is one of the closest open cities in China to the border. Tower is referred to as "Tarbatai" (Mongolian marmot). Tacheng is the seat of the Tacheng Prefectural Committee of the Communist Party of China and the administrative office of Tacheng area. In 1984, the county was removed and the city was established. In 1992, it was listed as a further open city along the border by the State Council. In June 1992, with the approval of the State Council, the national border was established.