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.
Yucheng, a county-level city under the jurisdiction of Dezhou City, Shandong Province, is located in the northwest of Shandong Province. it is a satellite city in Jinan, the capital of Shandong Province, and belongs to the economic circle around the Bohai Sea; it is all plain, high in the south and low in the north, high in the west and low in the east, and tilts slowly from the southwest to the northeast; it is a warm temperate continental monsoon climate with four distinct seasons, obvious dry and wet seasons and sufficient light. In 2017, the total population is 539000, with jurisdiction over 9 towns, 1 township and 2 streets. In 2017, Yucheng achieved a regional GDP of 27.94 billion yuan, an increase of 7.2% year-on-year at comparable prices. In October 2018, Yucheng was selected as the "top 100 counties with comprehensive strength", the top 100 counties and cities with national investment potential, the top 100 counties and cities with green development, the top 100 counties and cities with scientific and technological innovation, and the top 100 counties and cities with new urbanization quality. In October 2018, national farmers were obtained.