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.
Sanmenxia, a prefecture-level city under the jurisdiction of Henan Province, is located in the south golden triangle of the Yellow River at the junction of Henan, Shanxi and Shaanxi provinces. the landform is mainly mountains, hills and loess plateaus, belonging to a warm temperate continental monsoon semi-arid climate, with a total area of 10496 square kilometers. it has jurisdiction over 2 districts, 2 counties and 2 county-level cities, with a total population of 2.308 million in 2018. Sanmenxia is known as "five mountains, four ridges and one division of Sichuan", with Guanzhong in the west, Sanjin in the north and the Central Plains in the east. Longhai Railway, Lianhuo Expressway, National Highway 310, Zheng (Zhou) West ('an) High-speed Railway running from east to west, 209 National Highway, San (Menxia) Li (Sichuan) Expressway and Haoji Railway connect the north and south. It is a regional transportation hub city that connects Henan, Shanxi and Shaanxi provinces, north to south, west to east. At the same time, Yangshao culture, Taoist culture and Guo culture are all