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.
Wanyuan City, which belongs to Dazhou City, Sichuan Province, gets its name because it is located in Wanqingchi and the source of Zhujiang River. it is located in the northeast of Sichuan Province, the hinterland of Dabashan Mountain, the junction of Sichuan, Shaanxi and Chongqing, and the confluence of seven counties and cities. it is the dividing line of climate between the north and south of China and the watershed of Jialing River and Han River. By the end of 2018, Wanyuan City had jurisdiction over 52 townships, covering an area of 4065 square kilometers, with a total population of 573600. Wanyuan City was established in July 1993 and has obvious geographical advantages. it is the main passage of land traffic out of Sichuan Province. It is known as the "lock key of Qinchuan". It is crossed by trunk lines such as Xiang-Yu Railway, Baomao Expressway, National Highway 210 and 347. Wanyuan City is known as "the Source of Wanbao". It is one of the three selenium-rich belts in China and the only natural selenium-rich area in Sichuan Province.