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.
Yangshan County, which belongs to Qingyuan City, Guangdong Province, is located in the northwest of Guangdong Province, the middle part of Qingyuan, the southern foot of Nanling Mountains and the middle reaches of Lianjiang River. it is located between longitude 112 °22 °01mm east and latitude 23 °58470 °24 °5552' north. It is one of the 21 key counties of poverty alleviation and development in Guangdong Province. There was Yangyu State in the warring States period, Yangshanguan was established at the end of the Qin Dynasty, and Yangshan County was located in Gaozu of the Western Han Dynasty, which has a history of more than 2200 years. The county has a total area of 3418 square kilometers and has jurisdiction over 12 towns and one Yao township. As of 2018, Yangshan County has a total population of 569000. Yangshan County, 160 kilometers away from Guangzhou, is an important part of the "two-hour life circle" in the Pearl River Delta. The waterway is convenient. Lianjiang flows through the county from north to south, all the year round.