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.
Yan'an City, referred to as "Yan", the prefecture-level city of Shaanxi Province, is the first mausoleum in the world-the mausoleum of the first ancestor of the Chinese nation, the mausoleum of the Yellow Emperor: the site of the Yellow Emperor Mausoleum, is a sacred place for the nation, a sacred place for the Chinese revolution, and the first batch of famous national historical and cultural cities announced by the State Council. Yan'an is located in the north of Shaanxi Province, in the middle reaches of the Yellow River, in the south-central part of the Loess Plateau, and 371 kilometers north of the provincial capital Xi'an. It is connected to Yulin in the north, Xianyang, Tongchuan and Weinan in Guanzhong to the south, Linfen and Luliang in Shanxi to the east, and Qingyang in Gansu to the west. With a total area of 37037 square kilometers, it is known as "Sanqin key, five-way flap throat". Yan'an, known as Fushi and Yanzhou, is an important birthplace of the Chinese nation and the ancestor of humanities.