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.
Gaotai County, which belongs to Zhangye City, Gansu Province, is located in the middle of Hexi Corridor and the lower reaches of Heihe River. it has been known as "Hexi key, five counties throat" since ancient times. The terrain is high in the north and south and low in the middle, with the northern foot of the Qilian Mountains in the south, the Heli Mountain in the north, the oasis plain in the middle, and the Heihe River running through the county. The county has a total land area of 4346.61 square kilometers and has jurisdiction over 9 towns. By the end of 2017, Gaotai County had a total population of 158000. Gaotai County has a long history, Han Wudi Yuanding six years (111 years ago) set the table as a county, when the "Silk Road" must pass. In the first year of Xiankang in the Eastern Jin Dynasty (335 BC), Zhang Jun of Qianliang set up Jiankang County in Camel City. Qing Yongzheng three years (1725), and Gaotai, town Yi Shou Qianhu Gaotai County. There are ancient ruins of Camel City and Xu Sanwan City in the territory.