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.
Gannan Tibetan Autonomous Prefecture is an autonomous prefecture under the jurisdiction of Gansu Province, located in the southwest of Gansu Province, located in the northeast edge of the Qinghai-Tibet Plateau and the western part of the Loess Plateau, with high terrain in the northwest and low in the southeast, and has the characteristics of continental seasonal climate. The city has a total area of 38521 square kilometers and has jurisdiction over seven counties and one city, with a total population of 742300 in 2017. In Gannan Tibetan Autonomous Prefecture, there are Gahai-Zecha two national nature reserves, Lianhuashan and Yeliguan National Forest Park, as well as dozens of beautiful natural scenic spots such as Sangke grassland, the first song of the Yellow River, Dayugou and so on. There are 121 Tibetan Buddhist monasteries, including Xiahe Labrang Temple, Zhuoni Zen Temple and Luqu Langmu Monastery, which are protected by national cultural relics. There are more than ten revolutionary historical relics, such as the natural insurance Lazikou and the ruins of the Russian conference, which have the experience of the long March of the Red Army.