Oklahoma City (/oʊkləˌhoʊmə -/ (listen)), officially the City of Oklahoma City, and often shortened to OKC, is the capital and largest city of the U.S. state of Oklahoma. The county seat of Oklahoma County, it ranks 20th among United States cities in population, and is the 8th largest city in the Southern United States. The population grew following the 2010 census and reached 687,725 in the 2020 census. The Oklahoma City metropolitan area had a population of 1,396,445, and the Oklahoma City–Shawnee Combined Statistical Area had a population of 1,469,124, making it Oklahoma's largest municipality and metropolitan area by population.
Oklahoma City's city limits extend somewhat into Canadian, Cleveland, and Pottawatomie counties, though much of those areas outside the core Oklahoma County area are suburban tracts or protected rural zones (watershed). The city is the eighth-largest in the United States by area including consolidated city-counties; it is the second-largest, after Houston, not including consolidated cities. The city is also the second largest by area among state capital cities in the United States, after Juneau, Alaska.
Xishui County, a county under the jurisdiction of Huanggang City, Hubei Province, China, is an important part of Wuhan city circle. The total area is 1949.3 square kilometers, with a population of 1.08 million in 2016. Xishui County was formerly known as Qishui County. In order to avoid being confused with the name of Qichun County, the Republic of China was changed to Xishui County in 22 years (1933). Xishui County is located in the southern foot of the Dabie Mountains, eastern Hubei, the north bank of the middle reaches of the Yangtze River, Xishui County is located in the southern foot of the Dabie Mountains, eastern Hubei, the north bank of the middle reaches of the Yangtze River, belonging to Huanggang City. Located in the Yangtze River open development zones of Jiujiang, Huangshi and Wuhan, the Yangtze River waterway, Liujie Highway and Hu-Rong Expressway are in parallel transit; the Huangshi Yangtze River Bridge spans the Xishui River and scattered flowers; and the Beijing-Kowloon Railway runs across the territory and has two passenger and cargo stations, forming a network of railways, highways and waterways extending in all directions. There are 15 counties under the jurisdiction of Xishui county