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.
Chongzuo, a prefecture-level city under the jurisdiction of Guangxi Zhuang Autonomous region, is located in the southwest of Guangxi Zhuang Autonomous region, with geographical coordinates between 21 °36` ~ 23 °22` N and 106 °33` ~ 108 °6` E. it is bordered by Nanning City and Fangchenggang City in the east and southeast, Baise City in the north and Vietnam in the west. It is the prefecture-level city with the longest land border in Guangxi, with a total area of 17440 square kilometers. Chongzuo is the most convenient land passage from China to ASEAN, an important node city of China-Vietnam Corridor and Nanning-Singapore Economic Corridor, and one of the cities of Guangxi Beibu Gulf Economic Zone. There are 3 national first-class ports, 4 second-class ports and 13 border exchange points, which is the city with the largest number of border ports in China. The topography of Chongzuo City is slightly higher in the northwest and southwest.