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.
Xigu, Lanzhou area, located in the west gate of Lanzhou City, is the core industrial zone of Gansu Province and Lanzhou City, and the largest petrochemical base in western China. The region has a total area of 385 square kilometers and has jurisdiction over 40 administrative villages, 8 streets and 70 communities in 5 towns and 1 township. In 2015, the region's GDP reached 29.781 billion yuan. Xigu District has become one of the areas with the densest factors of production in the western region. It has won the titles of "National Spark Program Advanced County", "National Science and Technology Progress County", "National Science Popularization demonstration District", "National Cultural Advanced County", "National Family Planning Advanced County and District", Gansu Province double support Model City "six consecutive championships" and so on.