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.
Siping, a prefecture-level city in Jilin Province, is located in the central hinterland of Songliao Plain and at the junction of Liao, Jilin and Mongolia provinces. Siping is an important transportation hub and logistics node city in Northeast China, which leads to the Yangtze River Delta and Beijing-Tianjin-Hebei in the eastern part of Jilin, Heilongjiang and Inner Mongolia. Siping has an area of 14323 square kilometers and a population of 3.204 million, including an urban area of 1100 square kilometers and a population of 625000. Siping has jurisdiction over Tiedong District, Tiexi District, Gongzhuling City, Shuangliao City, Lishu County and Yitong County. Siping has a long history, and the site of the ancient city of Yan on the bank of Erlong Lake, 50 kilometers away from the urban area, is the witness of the Han nationality's earliest development of Northeast China. History has left cultural monuments such as Hanzhou in Liao Dynasty, Xinzhou in Jin Dynasty and Yehe Tribe in Ming Dynasty. Daqingshan Village cultural sites, Yehe ancient city ruins, Liao and Jin dynasties