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Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., and the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since 1854, the city has been coextensive with Philadelphia County, the most populous county in Pennsylvania and urban core of the Delaware Valley, the nation's seventh-largest and one of world's largest metropolitan regions with 6.245 million residents in 2020. The city's population at the 2020 census was 1,603,797, and over 56 million people live within 250 mi (400 km) of Philadelphia.

Philadelphia was founded in 1682 by William Penn, an English Quaker. The city served as capital of the Pennsylvania Colony during the British colonial era and went on to play a historic and vital role as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired the American Revolution and the nation's independence. Philadelphia hosted the First Continental Congress in 1774 following the Boston Tea Party, preserved the Liberty Bell, and hosted the Second Continental Congress during which the founders signed the Declaration of Independence, which historian Joseph Ellis has described as "the most potent and consequential words in American history". Once the Revolutionary War commenced, both the Battle of Germantown and the Siege of Fort Mifflin were fought within Philadelphia's city limits. The U.S. Constitution was later ratified in Philadelphia at the Philadelphia Convention of 1787. Philadelphia remained the nation's largest city until 1790, when it was surpassed by New York City, and served as the nation's first capital from May 10, 1775, until December 12, 1776, and on four subsequent occasions during and following the American Revolution, including from 1790 to 1800 while the new national capital of Washington, D.C., was under construction.

With 18 four-year universities and colleges, Philadelphia is one of the nation's leading centers for higher education and academic research. As of 2021[update], the Philadelphia metropolitan area was the state's largest and nation's ninth-largest metropolitan economy with a gross metropolitan product (GMP) of US$479 billion. The city is home to five Fortune 500 corporate headquarters as of 2022. The Philadelphia skyline, which includes several globally renowned commercial skyscrapers, is expanding, primarily with new residential high-rise condominiums. Philadelphia and the Delaware Valley are a biotechnology and venture capital hub; and the Philadelphia Stock Exchange, owned by NASDAQ, is the nation's oldest stock exchange and a global leader in options trading. 30th Street Station, the city's primary rail station, is the third-busiest Amtrak hub in the nation, and the city's multimodal transport and logistics infrastructure, including Philadelphia International Airport, the PhilaPort seaport, freight rail infrastructure, roadway traffic capacity, and warehouse storage space, are all expanding.

Guanxi District, which belongs to Jiujiang City, Jiangxi Province, is located in the north of Jiangxi Province, on the south bank of the middle and lower reaches of the Yangtze River, close to the center of Jiujiang, Poyang Lake in the east, Hubei and Anhui in the north, Changjiu Industrial Corridor in the west and Lushan Mountain in the south. The total area is 369.8 square kilometers and the coastline is 66 kilometers long. Qianxi District was originally Lushan District, known as "Jingjiu important Town, Pohu Pearl", with Jiujiang Yangtze River Wharf in the north and Jiujiang Lushan Airport in the west. Beijing-Kowloon Railway, Wujiu High-speed Railway, Changjiu Intercity High-speed Railway, Jiujingqu Railway, Tongjiu Railway, etc.; G70 Fuyin Expressway, G56 Hangzhou-Rui Expressway, S37 Jiujiang Round City Expressway, G105 National Highway and so on. In 2018, Guanxi District has jurisdiction over 3 streets, 5 towns and 2 townships, as well as a forestry institute, a new town and Changchang.
Airport In Lianxi District - Jiujiang Lushan Airport
Jiujiang Lushan Airport (Jiujiang Lushan Airport, IATA: JIU, ICAO: ZSJJ), referred to as "Lushan Airport", is located on Airport Road, Minshan Township, Chaisang District, Jiujiang City, Jiangxi Province, China, 8.5 kilometers away from the west gate of Lushan National Scenic Spot in the northeast. It is 16 kilometers away from the center of Chaisang District and 31 kilometers away from the center of Jiujiang. It is a 4C-level military-civilian tourism feeder airport   .
On June 18, 1996, Jiujiang Lushan Airport officially opened civil aviation services; in 2000, 2002, and 2006, Jiujiang Lushan Airport was suspended for three times; on March 21, 2015, Jiujiang Lushan Airport was suspended for renovation; on June 3, 2019 , Jiujiang Lushan Airport resumption and reconstruction project successfully tested flight   .
As of February 2021, the terminal building of Jiujiang Lushan Airport has an area of ​​11,815 square meters, and there are 3 category C remote stands on the civil aviation apron; the runway is 2,800 meters long and 50 meters wide, and can take off and land Airbus A320-200, Boeing B737- Models of 800 and below; can meet the needs of annual passenger throughput of 500,000 passengers   .
In 2021, Jiujiang Lushan Airport will handle a total of 15,880 passengers, ranking 241st in the country; 222 aircraft take-offs and landings, ranking 244th in the country   .
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