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.
Zichang City, which is directly under the jurisdiction of Shaanxi Province and managed by Yan'an City, is located in the middle of the Loess Plateau, Hengshan District to the north, Zizhou County and Qingjian County to the east, Yanchuan County and Yanan County to the south, Ansai District and Jingbian County to the west, between longitude 109o1158 "- 110o0120022" east and latitude 36 °593030 "- 37 °300000N, with a total area of 2405 square kilometers. The county seat is 93 kilometers away from Yan'an and 430 kilometers away from the provincial capital Xi'an. In 31 (1942), in memory of the national hero Xie Zichang, he changed his name to Zichang County, the hometown of Xie Zichang, the foothold of the long March of the Central Red Army and the starting place of the Anti-Japanese Eastern Expedition. The late agrarian revolution was the seat of the CPC Central Committee and the Chinese Soviet government, and after the founding of the people's Republic of China.