• Omaha
  • Qingshui Country

Omaha (/ˈoʊməhɑː/ OH-mə-hah) is the largest city in the U.S. state of Nebraska and the county seat of Douglas County. Omaha is in the Midwestern United States on the Missouri River, about 10 mi (15 km) north of the mouth of the Platte River. The nation's 39th-largest city, Omaha's 2020 census population was 486,051.

Omaha is the anchor of the eight-county, bi-state Omaha-Council Bluffs metropolitan area. The Omaha Metropolitan Area is the 58th-largest in the United States, with a population of 967,604. The Omaha-Council Bluffs-Fremont, NE-IA Combined Statistical Area (CSA) totaled 1,004,771, according to 2020 estimates. Approximately 1.5 million people reside within the Greater Omaha area, within a 50 mi (80 km) radius of Downtown Omaha. It is ranked as a global city by the Globalization and World Cities Research Network, which in 2020 gave it "sufficiency" status.

Omaha's pioneer period began in 1854, when the city was founded by speculators from neighboring Council Bluffs, Iowa. The city was founded along the Missouri River, and a crossing called Lone Tree Ferry earned the city its nickname, the "Gateway to the West". Omaha introduced this new West to the world in 1898, when it played host to the World's Fair, dubbed the Trans-Mississippi Exposition. During the 19th century, Omaha's central location in the United States spurred the city to become an important national transportation hub. Throughout the rest of the 19th century, the transportation and jobbing sectors were important in the city, along with its railroads and breweries. In the 20th century, the Omaha Stockyards, once the world's largest, and its meatpacking plants gained international prominence.

Qingshui County, under the jurisdiction of Tianshui City, Gansu Province, is located in the southeast of Gansu Province, northeast of Tianshui City, Niutou River Basin, a tributary of the Weihe River on the north bank of Longshan, southwest of Longshan; Longxian County, Baoji in the east, wheat accumulation area in the south, Qinan County in the west, and Zhangjiachuan Hui Autonomous County in the north; it is located in the transitional zone from Longshan Mountain to Longxi Loess Plateau, with temperate continental monsoon climate; it has jurisdiction over 15 towns and 3 townships with a total area of 2012 square kilometers. The total population in 2018 is 332364. Qingshui was called Shangfu in ancient times and got the name of the county from "four Notes of Qingquan". It is the birthplace of Huangdi Xuanyuan, the first ancestor of Chinese humanities, the birthplace of Qin unified China, and the hometown of Zhao Chongguo in the Western Han Dynasty. Prehistoric culture, pre-Qin culture, Han and Tang culture, Song (Jin) and Yuan culture accumulation; the territory has been identified by the State Administration of Cultural relics as "Wei and Jin ancient city" and "not"
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