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.
Huanglong County, which belongs to Yan'an City, Shaanxi Province, is located in the hilly and gully region of the Loess Plateau, in the north-central part of Shaanxi Province, on the southeast edge of Yan'an City. It is bordered by Luochuan in the west, Baishui in the south, Chengcheng and Heyang in the south, Hancheng in the east and Yichuan in the north. It is located between latitude 35 °24 °05 north latitude and longitude 110 °16 °49 east longitude, between north and south longitude 69.754 km long, east-west width 62.195 km, and total area 2752 square km. The skull fossils of the "Huanglong Man" unearthed about 50,000 years ago in Huanglong County filled a missing ring in the history of human development in China, and discovered the largest giant stone stone in the Neolithic Age in China.