• Columbus
  • Ulan County

Columbus (/kəˈlʌmbəs/) is the state capital and the most populous city in the U.S. state of Ohio. With a 2020 census population of 905,748, it is the 14th-most populous city in the U.S., the second-most populous city in the Midwest, after Chicago, and the third-most populous state capital. Columbus is the county seat of Franklin County; it also extends into Delaware and Fairfield counties. It is the core city of the Columbus metropolitan area, which encompasses 10 counties in central Ohio. The metropolitan area had a population of 2,138,926 in 2020, making it the largest entirely in Ohio[a] and 32nd-largest in the U.S.

Columbus originated as numerous Native American settlements on the banks of the Scioto River. Franklinton, now a city neighborhood, was the first European settlement, laid out in 1797. The city was founded in 1812 at the confluence of the Scioto and Olentangy rivers, and laid out to become the state capital. The city was named for Italian explorer Christopher Columbus. The city assumed the function of state capital in 1816 and county seat in 1824. Amid steady years of growth and industrialization, the city has experienced numerous floods and recessions. Beginning in the 1950s, Columbus began to experience significant growth; it became the largest city in Ohio in land and population by the early 1990s. The 1990s and 2000s saw redevelopment in numerous city neighborhoods, including Downtown.

Wulan County, which belongs to Haixi Mongolian-Tibetan Autonomous Prefecture of Qinghai Province, is located in the central part of Qinghai Province, Haixi Mongolian-Tibetan Autonomous Prefecture and the eastern part of Qaidam Basin, with Gonghe County of Hainan Tibetan Autonomous Prefecture in the east, Dulan County in the south, Delingha City in the west and Tianjun County in the north. The geographical coordinates are 97 °01 "99 °27" east and 36 °19 "37 °20" north. The county is 216.9 km long from east to west and 112km wide from north to south. The total land area of the county is 12858.16 square kilometers. As of 2010, Wulan County has jurisdiction over 4 towns, a total of 38 village (pastoral) committees, with a total population of 36555, including Han, Mongolian, Tibetan, Hui, Tu, Salar and other 17 ethnic groups. In 2010, Wulan County completed its gross domestic product (GDP).
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