Wichita (/ˈwɪtʃɪtɔː/ WITCH-ih-taw) is the largest city in the U.S. state of Kansas and the county seat of Sedgwick County. As of the 2020 census, the population of the city was 397,532. The Wichita metro area had a population of 647,610 in 2020. It is located in south-central Kansas on the Arkansas River.
Wichita began as a trading post on the Chisholm Trail in the 1860s and was incorporated as a city in 1870. It became a destination for cattle drives traveling north from Texas to Kansas railroads, earning it the nickname "Cowtown". Wyatt Earp served as a police officer in Wichita for around one year before going to Dodge City.
Tongling, a prefecture-level city in Anhui Province, is located in the south-central part of Anhui Province and the lower reaches of the Yangtze River, with Hefei to the north, Chizhou to the south, Wuhu to the east and Anqing to the west, with a total area of 3008 square kilometers. Tongling gets its name from copper and flourishes with copper. it is known as "the ancient copper capital of China and the contemporary copper base". The history of copper mining began in the Shang and Zhou dynasties, flourished in the Han and Tang dynasties, and lasted for more than 3500 years. The first furnace of copper water and the first copper ingot in New China came from Tongling. The first copper industrial base was built in Tongling, and the first copper stock was issued in Tongling. In 2018, Tongling had jurisdiction over three municipal districts and one county, with a resident population of 1.629 million, achieving a GDP of 122.24 billion yuan, of which