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.
Pu'an County, which belongs to the Buyi and Miao Autonomous Prefecture in southwestern Guizhou Province, is located in the southwest of Guizhou Province, adjacent to Qinglong County to the east, Xingren County and Xingyi City to the south, Panzhou City in Liupanshui City to the west, and Liuzhi Special Zone in Liupanshui City to the north. In 2015, the county has a total area of 1454 square kilometers, with jurisdiction over 2 streets, 8 towns and 2 townships, and Panshui Street where the county seat is located; it has an area of 254000 mu of arable land and a total population of 331900, inhabited by more than ten ethnic groups such as Han, Miao and Buyi. In 2014, Pu'an County completed a GDP of 5.015 billion yuan. There are 46 rivers in Pu'an County, the theoretical reserve of water energy is 270000 kilowatts, and there are 28 kinds of mineral deposits such as coal, gold, iron, silicon, lead and zinc. Puan County has the oldest in the world.