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.
Gaozhou, county-level cities under the jurisdiction of Guangdong Province, important small and medium-sized cities of Beibu Gulf Urban agglomeration in China, economically strong counties (cities) in mountainous areas of Guangdong Province, educational counties (cities) of Guangdong Province, and county medical centers of Guangdong Province, the comprehensive strength of economic and social development has long been in the forefront of Guangdong counties. Gaozhou is located in the southwest of Guangdong Province, southwest of Guangdong, near the South China Sea in the east, Jianjiang Plain in the south, Guangxi in the west, Yunkai Mountain in the north, six counties and cities in Guangdong and Guangxi in the west, Yangchun City and Dianbai District in the east, Maonan District in the south and Xinyi City in the north, bordering Huazhou City in the southwest and Beiliu City in Guangxi in the northwest. Gaozhou, formerly known as Maoming County and Gaozhou County, evolved from the administration of Maoming County by Gaozhou Prefecture (Road) in the Yuan Dynasty, while the place name of "Gaozhou" evolved from "Gaoliang". Before the Sui Dynasty, Gaoliang County was in the area of Enping and Yangjiang; since the Sui and Tang dynasties