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.
Pu'an County, which belongs to the Buyi and Miao Autonomous Prefecture in southwestern Guizhou Province, is located in the southwest of Guizhou Province, adjacent to Qinglong County to the east, Xingren County and Xingyi City to the south, Panzhou City in Liupanshui City to the west, and Liuzhi Special Zone in Liupanshui City to the north. In 2015, the county has a total area of 1454 square kilometers, with jurisdiction over 2 streets, 8 towns and 2 townships, and Panshui Street where the county seat is located; it has an area of 254000 mu of arable land and a total population of 331900, inhabited by more than ten ethnic groups such as Han, Miao and Buyi. In 2014, Pu'an County completed a GDP of 5.015 billion yuan. There are 46 rivers in Pu'an County, the theoretical reserve of water energy is 270000 kilowatts, and there are 28 kinds of mineral deposits such as coal, gold, iron, silicon, lead and zinc. Puan County has the oldest in the world.