• Omaha
  • Ludian 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.

Ludian County is one of the counties under the jurisdiction of Zhaotong City, Yunnan Province, located in the northeast of Yunnan Province, the south of Zhaotong City, the north bank of Niulan River. The east-west horizontal distance of the county is 50 kilometers, the north-south vertical distance is 60 kilometers, and the total area is 1519 square kilometers, of which the mountain area accounts for 87.9 percent of the total area and the dam area accounts for 12.1 percent. As of 2013, Ludian County has jurisdiction over 10 towns, 2 townships (including 2 ethnic townships), a total of 4 neighborhood committees and 80 administrative villages. The county government is in Wenping town. The vertical climate change in Ludian County is obvious, with no extreme heat in summer and no severe cold in winter. The average annual temperature is 12.1 ℃, the annual frost-free period is 220 days, and the average annual precipitation is 900mm. There are silver, lead, copper, sulfur, coal, phosphorus and other mineral deposits, Lemachang silver mine in the territory. Ludian County is the main producing county of wax insects in China, and the main producing county of walnut and high quality flue-cured tobacco in Yunnan Province.
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