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.
Dingxi is a prefecture-level city under the jurisdiction of Gansu Province, located in central Gansu, commonly known as "Longzhong"; it is located in the confluence area of the Loess Plateau and West Qinling Mountains, with large ups and downs, vertical and horizontal mountains and different shapes; its climate type belongs to the south temperate zone semi-humid-mid-temperate zone semi-arid zone, the continental monsoon climate is obvious; the city's total area is 20330 square kilometers, under the jurisdiction of 1 district, 6 counties; 2018 resident population 2.8217 million. Dingxi is a national summer resort observation city, with more than 60 tourist attractions and tourist spots. Weiheyuan, Guiqing Mountain, Shade Mountain, Langdu Wetland grassland and Taohe tourist promenade are all places for summer leisure. Dingxi not only gave birth to Li culture, but also the intersection of prehistoric cultures such as Majiayao, Qijia, Siwa, Xindian and other prehistoric cultures and important calligraphy and painting in the country.