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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.

Caidian District, subordinate to Wuhan City, Hubei Province, is located in the western suburb of Wuhan City, located in the triangle zone of the confluence of the Han River and the Yangtze River, in the east of the Jianghan Plain, near the Han River in the north, and dependent on the lips and teeth of the East and West Lake District; facing the Tongshun River in the south, connected by mountains and rivers in Hannan District; bordering the Yangtze River in the east and facing Jiangxia District across the water; bordering Hanchuan City in the west; Hanyang District in the northeast; Xiantao City in the southwest. It is between 113o 41mm east longitude and 114o 13' north latitude, with a total area of 1093.57 square kilometers. By 2018, Caidian District had jurisdiction over 12 streets and 1 township, and had 4 management committees with a resident population of 466600, realizing a GDP of 47.607 billion yuan, of which the added value of the primary industry was 4.298 billion yuan.
Airport In Caidian District - Wuhan Tianhe International Airport
Wuhan Tianhe International Airport (Wuhan Tianhe International Airport, IATA: WUH, ICAO: ZHHH), located in Huangpi District, Wuhan City, Hubei Province, China, 25 kilometers away from the center of Wuhan, is the first 4F civil international airport in central China   , one of the eight major regional hub airports in China, an airport with international scheduled flights, and a first-class air port open to the outside world   . In January 2019, the airport began to implement a 144-hour transit visa-free policy.
The field was officially completed and open to navigation on April 15, 1995, named "Wuhan Tianhe Airport"; it was identified as an international airport in 2000; the second phase of the expansion project was completed in April 2008. The third-phase expansion project was substantially started in June 2013, passed the completion acceptance in June 2017, and passed the industry acceptance in August 2017 and put into use.  
As of August 2020, Wuhan Tianhe International Airport has 1 terminal building with a total area of ​​495,000 square meters; 2 runways with lengths of 3,400 meters and 3,600 meters respectively; a total of 117 seats, and an air cargo terminal of 56,042 square meters meters; it can meet the needs of annual passenger throughput of 35 million person-times, cargo and mail throughput of 440,000 tons, and aircraft take-off and landing of 404,000 sorties.   
In 2019, the passenger throughput of Wuhan Tianhe International Airport was 27.15 million, a year-on-year increase of 10.8%; the cargo and mail throughput was 243,000 tons, a year-on-year increase of 9.8%; the number of transportation movements was 203,000, a year-on-year increase of 8.2%.  
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