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Chicago (/ʃɪˈkɑːɡoʊ/ (listen) shih-KAH-goh, locally also /ʃɪˈkɔːɡoʊ/ shih-KAW-goh) is the most populous city in the U.S. state of Illinois and the third-most populous in the United States, after New York City and Los Angeles. With a population of 2,746,388 in the 2020 census, it is also the most populous city in the Midwest. As the seat of Cook County (the second-most populous U.S. county), the city is the center of the Chicago metropolitan area, one of the largest in the world.

On the shore of Lake Michigan, Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed. It grew rapidly in the mid-19th century; by 1860, Chicago was the youngest U.S. city to exceed a population of 100,000. The Great Chicago Fire in 1871 destroyed several square miles and left more than 100,000 homeless, but Chicago's population continued to grow to 503,000 by 1880 and then doubled to more than a million within the decade. The construction boom accelerated population growth throughout the following decades, and by 1900, less than 30 years after the fire, Chicago was the fifth-largest city in the world. Chicago made noted contributions to urban planning and zoning standards, including new construction styles (such as, Chicago School architecture, the development of the City Beautiful Movement, and the steel-framed skyscraper).

Chicago is an international hub for finance, culture, commerce, industry, education, technology, telecommunications, and transportation. It is the site of the creation of the first standardized futures contracts, issued by the Chicago Board of Trade, which today is part of the largest and most diverse derivatives market in the world, generating 20% of all volume in commodities and financial futures alone. O'Hare International Airport is routinely ranked among the world's top six busiest airports according to tracked data by the Airports Council International. The region also has the largest number of federal highways and is the nation's railroad hub. The Chicago area has one of the highest gross domestic products (GDP) in the world, generating $689 billion in 2018. The economy of Chicago is diverse, with no single industry employing more than 14% of the workforce. It is home to several Fortune 500 companies, including Archer Daniels Midland, Conagra Brands, Exelon, JLL, Kraft Heinz, McDonald's, Mondelez International, Motorola Solutions, Sears, and United Airlines Holdings.

Zhangqiu District is a municipal district of Jinan City, Shandong Province, which is located in the east of Jinan City, between 36 °25 degrees north latitude 37 °09 degrees north latitude and 117 °10 degrees east longitude. Zhangqiu area is located in mountains, hills and plains, high in the south and low in the north, and the Yellow River flows through the north. Zhangqiu area has a warm temperate semi-humid continental monsoon climate. Four distinct seasons, rain and heat in the same season. As of 2017, Zhangqiu District has a total area of 1719 square kilometers and has jurisdiction over 15 streets, 3 towns and 921 villages, with a registered population of 1.052 million at the end of 2018. In 2018, the annual GDP of Zhangqiu District reached 107.27 billion yuan, an increase of 11.1%. Zhangqiu District has successively won the honors of "National double support Model City", National Sanitary City, "hometown of Chinese Black Pottery" and so on.
Airport In Zhangqiu District - Jinan Yaoqiang International Airport
Jinan Yaoqiang International Airport (Jinan Yaoqiang International Airport, IATA: TNA, ICAO: ZSJN), located at the junction of Licheng District and Zhangqiu District, Jinan City, Shandong Province, China, 30 kilometers away from the city center, is a 4E-class civil international airport. One of the important entry gateways and arterial airports.  
Jinan Yaoqiang International Airport was completed and opened to navigation on July 26, 1992. The expansion project of the flight area was completed in October 2000; the expansion project of the terminal area was completed in March 2005; and the south concourse project of the terminal building was started in 2010.  
According to information on the airport's official website in September 2017, Jinan Yaoqiang International Airport covers an area of ​​7,200 acres, with a total terminal building area of ​​114,000 square meters, of which the south corridor covers an area of ​​30,000 square meters, which can guarantee an annual passenger throughput of 12 million , 4,500 passengers at peak hours, and 100,000 aircraft takeoffs and landings; the apron is 440,000 square meters in total, with 24 boarding bridges.   As of the end of 2016, the airport has more than 140 air routes.  
In 2018, the passenger throughput of Jinan Yaoqiang International Airport reached 16.612 million, a year-on-year increase of 16%   . On the morning of August 27, 2022, the Jinan Yaoqiang Airport Phase II Reconstruction and Expansion Project Construction Promotion Meeting was held at Yaoqiang International Airport.  
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