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.
Binchuan County is one of the counties under the jurisdiction of Dali Prefecture in Yunnan Province. it is located on the edge of the Yunling Hengduan Mountains and the southwest of the Yunnan-Guizhou Plateau on the south bank of the Jinsha River. Most of the main mountains, dams and rivers in the territory run from north to south. The terrain is high from east to west and low in the middle. There are four river systems: Naxi River, Pingchuan River, Qingshui River and Duobeiqing River. The Naxi River is the largest, running through the central dam area of Binchuan, and the Liandong River is the largest tributary. By the end of 2010, the total population of Binchuan County was 351940. Binchuan is a multi-ethnic county dominated by the Han nationality, which is inhabited by 25 ethnic groups. There are Jizu Mountain, a national AAAA-level scenic spot. On September 29, 2018, Binchuan County was approved to withdraw from the poverty-stricken county after being studied by the Yunnan Provincial Party Committee and the Yunnan Provincial Government. December 13, 2018, selected as the dominant area of agricultural products with Chinese characteristics