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.
Jianchang County, which belongs to Huludao City, Liaoning Province, is located in the northwest of Huludao City. It is bordered by Lianshan District and Xingcheng City in the east, Suizhong County in the south, Lingyuan City in the northwest, Azure Dragon Manchu Autonomous County and Haigang District in Qinhuangdao City, Hebei Province in the southwest, and Kazuo and Chaoyang counties in the north. Jianchang County has a total land area of 3181 square kilometers. Cultivated land is 890000 mu. The population of Jianchang County is 650000 (2011). There are Han, Manchu, Mongolian, Hui, Korean and other ethnic groups. Jianchang County is located in the hilly and mountainous areas of western Liaoning, where the Yanshan Mountains extend. The terrain is high in the northwest and low in the southeast. The Songling Mountains run northeast and southwest, running through the county. Daqingshan, the highest peak, is 1223 meters above sea level and is famous for its roofs in western Liaoning. There are more than 40 rivers that originate and flow through the county, and the main rivers are Daling River, Liugu River, Qinglong River and Heishui River. Within the territory, there are large,