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.
Wanshan District, which belongs to Tongren City, Guizhou Province, is the main urban area of Tongren City. It is dominated by karst karst landforms and belongs to the mid-subtropical monsoon humid climate. In November 2011, the State Council approved the cancellation of Tongren City at the prefecture level and the establishment of Wanshan District. It now covers an area of 842 square kilometers with a total population of 270000 and has jurisdiction over 11 townships (towns and streets). With convenient transportation, Wanshan is an important transportation hub for Sichuan and Chongqing to reach the sea from the east, Shanghai and Hangzhou to the west to Guizhou and Yunnan, Beijing and Tianjin to the south to Guiqiong, Guangzhou and Shenzhen to the north to Shaanxi and Gansu. The three expressways of Shanghai, Kunming, Hangzhou and Rui pass through the border. Hunan-Guizhou Railway, Zhu-Liu double Line and Yu-Huai double Line are surrounded by three railways, reaching Tongren Railway Station, Tongren High-speed Railway Station and Zhusha Guzhen Station in 10 minutes, and Dalong, Yuping, Xinhuang Railway Station and Shanghai-Kunming High-speed Railway Station Tongren in 30 minutes.