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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.

Jiangyou, a county-level city under Mianyang's jurisdiction, is located in the north of Sichuan Basin and the northern end of Chengdu-Chongqing Economic Zone. It is an excellent tourist city in China, a national advanced health city, a national modern agricultural demonstration zone, a national leisure agriculture and rural tourism demonstration county, a famous historical and cultural city in Sichuan Province, the first batch of "strong industrial counties" demonstration cities, beautiful environment demonstration cities, rule of law cities, civilized cities and model cities with double support. China (Mianyang) Science and Technology City is in the vanguard of economic and social development, covering an area of 2719 square kilometers with a total population of 880000, with an urban built-up area of 50 square kilometers and a resident population of 500000. It has jurisdiction over 39 townships, 3 offices and 1 provincial high-tech industrial park. In 2017, the city's GDP reached 38.46 billion yuan. Jiangyou is an important commodity grain base of the country.
Airport In Jiangyou City - Mianyang Nanjiao Airport
Mianyang Nanjiao Airport (Mianyang Nanjiao Airport, IATA: MIG, ICAO: ZUMY) is referred to as Mianyang Airport; it is located on Airport East Road, Tangxun Street, Economic and Technological Development Zone, Mianyang City, Sichuan Province, China, 10 kilometers away from the center of Mianyang. It is a 4D civil transport Airport   .
Mianyang Nanjiao Airport was approved for construction in 1994 and named Mianyang Nanjiao Airport   ; Construction started in July 1997; it was officially completed and opened to navigation on April 28, 2001   .
Mianyang Nanjiao Airport has T1 and T2 terminals, with a total area of ​​48,000 square meters; a runway with a length of 2,400 meters; an apron of 111,000 square meters and 20 parking spaces; the annual passenger throughput is guaranteed to be 6 million.     As of November 2022, 59 routes and 42 cities have been opened.  
In 2019, the passenger throughput of Mianyang Nanjiao Airport was 4,159,400 passengers, a year-on-year increase of 5.6%; the cargo and mail throughput was 8,800 tons, a year-on-year increase of 16.8%; the number of takeoffs and landings was 189,900, a year-on-year increase of 7.6%; ranking 49th in China respectively , 62nd, 17th.  
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