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.
Changning County, which belongs to Yibin City, Sichuan Province, is located in the southern edge of Sichuan Basin, in the heart of Yibin City, between longitude 10444 °22 "~ 105 °03 °30" east longitude 28 °15 °18 "~ 28 °470048", about 60 kilometers from north to south, 30 kilometers from east to west, an area of 1000.2 square kilometers, forest coverage of 62.8%, and the content of negative oxygen ions in the air can reach up to 47000 per cubic centimeter (Qidonggou). It is a famous hometown of longevity. As of August 24, 2019, Changning County has jurisdiction over 13 towns with a total population of 460400 (2018). There are 9 ethnic groups, including Han, Miao and Yi, among which 28 are over 100 years old, the oldest is 112 years old, and the number of people over 90 years old has reached 1075.