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.
Wuqi County, which belongs to Yan'an City, Shaanxi Province, is located in the northwest of Yan'an City, Dingbian County in the northwest, Zhidan County in the southeast, Jingbian County in the northeast, and Huachi County in Gansu Province in the southwest. The geomorphology belongs to the beam-shaped hilly and gully region of the Loess Plateau, with an elevation of 1233m between 1809 m. There are two major basins of Wuding River and Beiluo River in the territory, and the main structure of the terrain can be summarized as "Bachuan Erjian two mountainous areas". Since 1998, the policy of returning farmland to forests has been implemented, and the coverage rate of forest and grass has reached 49.6%. As of March 2019, Wuqi County has jurisdiction over 8 towns, 1 street office, 91 administrative villages and 8 urban communities, with a total area of 3791.5 square kilometers and a resident population of 152100 (2017), including an agricultural population of 106000. The oil industry is an important pillar of the economic development of Wuqi County.