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.
Panjin City is a prefecture-level city under the jurisdiction of Liaoning Province, located in the central and southern part of Liaoning Province, located in the center of the Liaohe Delta, is a city at the mouth of the Liaohe River; its geomorphology is high in the north and low in the south, gradually tilting from north to south; it is located in the north temperate zone and belongs to the warm temperate continental semi-humid monsoon climate; it has jurisdiction over one county and three districts; the city has a resident population of 1.439 million at the end of 2018, with a total area of 4102.9 square kilometers. Panjin is an important oil and petrochemical industry base in China and one of the important central cities in Liaoning coastal economic belt. Panjin is a "petrochemical new city", built on the edge of oil and flourished because of oil; the red beach scenic spot dominated by the Red Beach National Scenic Corridor is a national 4A-level scenic spot and an excellent tourist scenic spot in Liaoning Province. The ancient town Tianzhuangtai was the battlefield of the last battle of the Sino-Japanese land war between China and Japan, and became the education of patriotism.