• Omaha
  • Changwu  County

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.

Changwu County, which belongs to Xianyang City, Shaanxi Province, is located in the west of Guanzhong and on the south side of the middle reaches of Jinghe River in the northwest of Xianyang City. It is adjacent to Bin County in the east, Lingtai County in Gansu Province to the south, Jingchuan County in Gansu Province to the west, and Ningxian County and Zhengning County in Gansu Province to the north. Between longitude 107 °38 "49"-107 °58 "02" east and latitude 34 °59 °09 "- 35 °18" 37 "north. The longest point from north to south is 30.06km, and the widest from east to west is 27.23km, with a total area of 567.1 square kilometers. In 2018, Changwu County has jurisdiction over 1 street and 7 towns. At the end of 2016, the resident population of Changwu County was 170878, with a regional gross domestic product (GDP) of 7.2999 billion yuan, of which the added value of the primary industry was 15.86.
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