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.
Qihe County, which belongs to Dezhou City, is located in the western part of Shandong Province, with Jinan, the provincial capital to the east, Beijing, Tianjin and Tang to the north, and Nanjing, Shanghai and Hangzhou to the south. With Qihe River as the center, there are Qingdao, Jinan, Taiyuan, Zhengzhou, Shijiazhuang, Tianjin, Beijing and other big cities within a radius of 500 kilometers. Qihe River is located in the northwest plain of Shandong Province, the north bank of the Yellow River, and Jinan across the river. The county has jurisdiction over 2 townships, 11 towns and 2 subdistrict offices, with a total population of 780000 and a total area of 1411 square kilometers. It is an alluvial plain in the lower reaches of the Yellow River with fertile soil, suitable climate and sufficient light. Qihe is the most beautiful ecotourism demonstration city in China, the only new energy automobile manufacturing city in China and the equipment manufacturing city of emerging industries in China. Qihe County is also the only top 100 counties on the list of underdeveloped areas in Shandong Province, ranking among the 15th national counties.