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.
Yinchuan, referred to as "Yin", is the capital of Ningxia Hui Autonomous region, a national historical and cultural city, and one of the important central cities in Northwest China. The military, political, economic, cultural, scientific research, transportation and financial center of the autonomous region is a comprehensive industrial city focusing on the development of light and textile industry and coordinated development of machinery, chemical industry and building materials industry. Located in the middle of Ningxia Plain, located on the western edge of Ordos in the east and Helan Mountain in the west, the Yellow River runs through the city. It is a famous historical and cultural city in China, a central city in the adjacent area of Ningxia, Inner Mongolia, Shaanxi and Gansu, and a node city of the Silk Road. it is a key economic zone for the in-depth implementation of the western development strategy. Yinchuan is an ancient city with a long history. Human beings thrived at the Shuidonggou site as early as 30,000 years ago. Yinchuan, the capital of the Xixia Dynasty in history, is a famous historical and cultural city of the country.