• Omaha
  • Derong

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.

Derong County, which belongs to Ganzi Prefecture, Sichuan Province, is located in 99 °07 east longitude and 29 °10 'north latitude. Located in the southwest of Sichuan Province, it is located in the middle of the Great Shangri-La Tourism Ring at the junction of Sichuan, Yunnan and Tibet. Derong County belongs to the dry valley of the Jinsha River, which is connected with Batang and Xiangcheng County of Ganzi Prefecture in the north, Shangri-La County of Diqing Prefecture of Yunnan Province in the southeast and Deqin County of Diqing Prefecture of Yunnan Province in the southwest. It is 670km away from the state capital Kangding, 1040 km away from Chengdu (Kangding direction), and about 1477 km from Yunnan to Chengdu. In 2017, Derong County has an area of 2916 square kilometers and has jurisdiction over 3 towns and 9 townships, including 127villages, 3 communities and 251natural villages. By the end of 2017, Derong County has a total population of 25859.
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