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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.

Haian, a county-level city in Jiangsu Province, is hosted by Nantong City and gets its name from the meaning of "the sea never blows waves". It is located in the central and southern part of Jiangsu Province, at the junction of Nantong, Yancheng and Taizhou, bordering the Yellow Sea to the east, bordering Rudong to the east, Jiangyan District in Taizhou to the west, Rugao and Taixing to the south, and Dongtai to the north. The longest east-west line of Haian is 71.1km, the widest from north to south is 39.35km, with a total area of 1180 square kilometers. it has jurisdiction over 4 streets and 9 towns, with a resident population of 864500 (at the end of 2018). Haian is the origin of river and sea civilization. The Qingdun site in Haian traces the history of the Jianghuai Plain to 6000 years ago. The Qingdun site represents the advanced level in the eastern part of Jianghuai in the Neolithic Age. Hai'an is history.
Airport In Haian  - Nantong Xingdong International Airport
Nantong Xingdong International Airport (Nantong Xingdong International Airport, IATA: NTG, ICAO: ZSNT), located in Tongzhou District, Nantong City, Jiangsu Province, China, is 10 kilometers away from the city center. It is a 4E-level civilian international airport and the first in Jiangsu Province. A civil transport airport solely used by civil aviation   , is also the auxiliary airport of Shanghai International Aviation Hub   .
Nantong Xingdong International Airport was officially completed on August 24, 1993 and named Nantong Xingdong Airport; it was renamed Nantong Xingdong International Airport on July 22, 2016   ;The first phase of reconstruction and expansion was completed in April 2012; the second phase of reconstruction and expansion was completed on August 18, 2019    .
As of August 2019, Nantong Xingdong International Airport has two terminals, namely T2 (suspended) and T3 (domestic and international in China), with a total area of ​​67,000 square meters; there is a runway with a length of 3,400 meters; 34 parking spaces   . As of March 2019, Nantong Xingdong International Airport has 37 domestic and international navigation cities   .
In 2019, the passenger throughput of Nantong Xingdong International Airport was 3.4844 million passengers, a year-on-year increase of 25.7%; the cargo and mail throughput was 42,200 tons, a year-on-year decrease of 1.7%; the number of takeoffs and landings was 34,500, a year-on-year increase of 2.4%; 51st, 42nd, 70th   .
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