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.
Siyang is located in Subei Plain, one of the "Ten New Tianfu" in China, belongs to the Yangtze River Delta region, is the Huaihai Economic Circle, the Yangtze River Delta Economic Circle and the cross radiation area along the canal town axis. Siyang faces the hometown of Zhou Enlai Huai'an to the east, Suqian the hometown of King Xiang to the west, Shuyang, the hometown of flowers and plants to the north, and Hongze Lake to the south, facing Sihong, Hongze and Xuyi across the lake. The Siyang section of the Grand Canal of China (the Beijing-Hangzhou Grand Canal and the ancient Yellow River heritage site) is on the World Heritage list. It has the reputation of "plain, forest and sea, Xanadu". Siyang has a history of more than 5000 years of civilization and more than 2000 years of history of establishing a county, where the north and south cultures are integrated. Siyang was once the capital of Sishui in the Western Han Dynasty more than two thousand years ago. It has been established at the county level in 2233 years, and it was crowned twice in the Western Han Dynasty, which was called "Surabaya" in history, which lasted for 134 years. Siyang is China.