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.
Yibin, a prefecture-level city in Sichuan Province, is known as "the first city of the Yangtze River, the wine capital of China, and the bamboo capital of China". Located in the junction of the three provinces of Yunnan, Guizhou and Sichuan, at the confluence of Jinsha River, Minjiang River and Yangtze River; the terrain is high in the southwest and low in the northeast, which belongs to the humid climate of the mid-subtropical monsoon, and the forest coverage of the city is more than 46%. The content of negative oxygen ions in the air is as high as 47000 / cubic centimeter (Qidonggou), which is extremely suitable for human habitation. Changning County in the area has become a famous Changshou County. It covers an area of 13283 square kilometers and has jurisdiction over 3 districts and 7 counties. At the end of 2018, the registered population is 5.523 million. Yibin has a profound cultural heritage, with a history of 2200 years of city building, 4000 years of wine-making history and 3000 years of tea-growing history. It is a famous national historical and cultural city. There have been a large number of celebrities in past dynasties, who have raised Li Shuoxun.