• Oklahoma City
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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.

Zhenglan Banner is a flag belonging to Xilingol League of Inner Mongolia Autonomous region. it is located in the south of Inner Mongolia Autonomous region and the southern end of Xilingol League in Paradise grassland. It is only 180 kilometers away from the capital Beijing. It is the nearest typical grassland area to Beijing. Longitude 116.02 °east, latitude 42.25 °north. Zhenglan Banner has a total area of 10182 square kilometers, a total population of 83000 and a peak population of 105000. It is a multi-ethnic area dominated by Mongolians. It is Hunshandake sandy land in the north, showing the natural scenery of sandy grassland, and low mountains and hills in the south, showing the beauty of meadow steppe. Zhenglan Banner is rich in water resources, including 21 rivers and 147 lakes. The banner is rich in wild animal and plant resources. There are 708 species of plants and rare fields in the banner.
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