• Oklahoma City
  • Longchang City

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.

Longchang is a county-level city hosted by Neijiang City in Sichuan Province, which is located in the southeast of Sichuan Province and the southern end of Neijiang City. The ground span ranges from 105 degrees 02 to 105 degrees 26 degrees east longitude and from 29 degrees 11 to 29 degrees 32 degrees north latitude. It is adjacent to Rongchang District of Chongqing City in the east, Lu County of Luzhou City in the south, Fushun County of Zigong City and Daan District of Zigong City in the west, Dongxing District in the north, 210 kilometers away from Chengdu and 138 kilometers away from Chongqing. Longchang covers an area of 794.41 square kilometers; it has jurisdiction over 2 streets and 13 towns; it has a total population of 778000 in 2015; in 2015, Longchang achieved a GDP of 23.3 billion yuan and a per capita GDP of 36096 yuan. Belongs to the subtropical humid monsoon climate, the annual average temperature is 17.7 ℃, the frost-free period is 324 days, and the annual rainfall is 10%.
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