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.
Angren County, which belongs to Xigaze City, is located in the north-west of Xigaze, the upper reaches of the Brahmaputra River, on the middle ridge of the Gangdise Mountains, between 87.14 °- 87.75 °east longitude and 29.17 °- 31 °north latitude. It is bordered by Xietongmen County and Lazi County to the east, Cuoqin County and Saga County to the west, Nie Lamu and Dingri County to the south, and Shenza County to the north. La (Zi) Pu (Lanzhou) Highway (National Highway 219) runs through the southern part of the border. The county has an average elevation of 4513 meters, with a total area of 39600 square kilometers, accounting for 21.78% of the total area of Xigaze City. In 2010, the GNP of Angren County reached 396.12 million yuan, an increase of 13.5 percent over 2009, and the per capita GDP reached 7682 yuan, an increase of 10 percent over 2009. In 2013, Anren County had jurisdiction over two towns,