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.
Haidong is a prefecture-level city under the jurisdiction of Qinghai Province, named because it is located to the east of Qinghai Lake; it belongs to the mosaic zone from the Loess Plateau to the Qinghai-Tibet Plateau, with a semi-arid continental climate; the city has a total area of 13200 square kilometers and has jurisdiction over 2 districts and 4 autonomous counties; in 2017, it has a resident population of 1.4708 million. Haidong has a long history. In the long historical evolution, Hehuang region has changed from the primitive nomadic state of "living after water and grass" to a more developed farming civilization. The people of all ethnic groups in Hehuang have jointly developed and built this land, creating a splendid history and culture. In December 2016, it was listed as the third batch of national comprehensive pilot areas for new urbanization. In 2017, the GDP of Haidong City was 43.6 billion yuan, an increase of 8.4 percent over the previous year at comparable prices. Among them, the added value of the primary industry