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.
Liupanshui City is a prefecture-level city in Guizhou Province. Liupanshui City is located in Wumeng Mountain area of western Guizhou, with an annual average temperature of 15 ℃, an average temperature of 19.7 ℃ in summer and an average temperature of 3 ℃ in winter. With a cool, comfortable, moist, fresh climate and moderate ultraviolet radiation, it has been awarded the title of "cool capital of China" by the Chinese Meteorological Association and is the only city in the country named after its climatic characteristics. During the Spring and Autumn period, Liupanshui was a dependency of Yelang; during the warring States period, the city was a dependency of Yelang, which entered the farming era and reflected the characteristics of slave production relations due to the use of metal tools; after Qin unified China, it was a dependency of Hanyang County, Ba County. Liupanshui is located in the junction of Yunnan and Guizhou provinces, the watershed in the upper reaches of the Yangtze and Pearl Rivers, and both sides of the Nanpanjiang and Beipanjiang basins, which is rich in mineral resources. Traffic extends in all directions and is important in the southwest.