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.
Yangzhong, under the jurisdiction of county-level cities in Jiangsu Province, is hosted by Zhenjiang City. Located in the middle of the river in the east of Zhenjiang City, the golden waterway-the middle and lower reaches of the Yangtze River, and in the demonstration area of modernization in southern Jiangsu, it is a member of the county-level cities in Nanjing metropolitan area, "facing Yangzhou and Taizhou in the north and separated by water in Zhenjiang and Changzhou in the south. The city is composed of Taiping Island, Central Sha Island, Xisha Island and Leigong Island, with a total area of 331 square kilometers, of which the land area is 243 square kilometers. The deepwater coastline along the Yangtze River is 62.7 kilometers. It has jurisdiction over 4 towns, 2 streets, Yangzhong Economic Development Zone and Yangzhong High-tech Zone, with a total population of 340000, which plays an important role in the overall development of Zhenjiang. Yangzhong industry has distinctive characteristics, is the well-known "electric island" and "photovoltaic island", and the "Yangtze River Manufacturing Corridor" in which the electrical field is the largest in China.