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.
Tianzhu Tibetan Autonomous County (Tianzhu County for short), which is under the jurisdiction of Wuwei City, Gansu Province, is the first area to exercise regional ethnic autonomy after the founding of the people's Republic of China. Tianzhu, known as Huarui in Tibetan, means heroic tribe. The Summer Solstice was the pastoral land of Rong Qiang, Yueshi, Xiongnu and other ethnic groups in the early Han Dynasty, which was included in the territory of the Han Dynasty since Emperor Wu of the Han Dynasty. after the Tang Dynasty, it gradually formed a multi-ethnic settlement with Tubo (present-day Tibetan) as the main ethnic group. Tianzhu County is located in the middle of Gansu Province, in the south of Wuwei City, in the Hexi Corridor and the eastern end of Qilian Mountains. Jingtai County in the east, Menyuan County in Haibei Prefecture of Qinghai Province in the west, Huzhu County in Haidong City and Ledu District in Haidong City in the west, Yongdeng County in the south, Liangzhou District and Gulang County in the north, and Sunan County in the northwest. By the end of 2011, Tianzhu County covers an area of 7149 square kilometers and has jurisdiction over 9 towns and 10 towns.