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.
Nangqian County, which belongs to Yushu Prefecture, Qinghai Province, is located in longitude 95 °21 "58" ~ 97 °07 "0" east and latitude 31 °32 "20" ~ 32 °43 "46" north. It is adjacent to Haixi Mongolian Tibetan Autonomous Prefecture in the north, Guoluo Tibetan Autonomous Prefecture in the east, Ganzi Tibetan Autonomous Prefecture in Sichuan Province to the southeast, and Changdu in the Tibet Autonomous region to the south. The longest is 157.5 kilometers from east to west, and the widest from north to south is 130.5 kilometers, with a total area of 12741 square kilometers. In 2013, the total population of Nangqian County was 130000, including Tibetan, Han, Hui, Tu and other ethnic minorities. Nangqian County has gold, silver, copper, iron, lead, zinc, tin, gypsum, sulfur, limestone, coal, salt and other mineral resources. In 2013, the gross domestic product of Nangqian County reached 7.449 billion yuan.