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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.

Jiande City, which belongs to Hangzhou City, Zhejiang Province, is located in the west of Zhejiang Province, in the upper reaches of Qiantang River, bordering Pujiang County in the east, Lanxi City and Longyou County in the south, Qujiang District in Quzhou City in the southwest, Chun'an County in the northwest and Tonglu County in the northeast. Jiande City has a total area of 2314.19 square kilometers, accounting for 2.28% of Zhejiang Province, and is 108km away from Hangzhou expressway. The border water system of Jiande City belongs to the Qiantang River Basin, with 4 large rivers and 38 small and medium-sized streams of Xin'an River and its tributaries Shouchang River, Lanjiang River and Fuchun River. The mountains and hills account for 88.6% of the total area of the city. Sandstone, limestone and shale from Paleozoic to Cenozoic in the northern and western mountains, and hills below 200 meters in the south. In December 2019, it became the national rural governance system.
Airport In Jiande City - Hangzhou Xiaoshan International Airport
Hangzhou Xiaoshan International Airport (Hangzhou International Airport, IATA: HGH, ICAO: ZSHC), located in Xiaoshan District, Hangzhou City, Zhejiang Province, China, 27 kilometers away from the city center, is a 4F civil transport airport and one of the twelve major trunk line airports in China , international scheduled flight airports, first-class air ports open to the outside world, and international flight alternate airports.    In October 2019, it became an air port implementing a 144-hour transit visa-free policy.     
Hangzhou Xiaoshan International Airport was relocated from the civil aviation part of the original Hangzhou Jianqiao Airport to build a new one. In November 2007, the second phase of the project started construction and was completed and put into operation in December 2012.  
According to the information on the airport's official website in August 2017, the airport covers an area of ​​10 square kilometers and has four terminals, T1, T3 (domestic) terminal, T2 (international, Hong Kong, Macao and Taiwan) terminal and T4 terminal, T1, T2 and T3 have a total area of ​​370,000 square meters; there are two runways with lengths of 3,600 meters and 3,400 meters respectively, which can meet the standby landing requirements of A380 and below models; passenger plane apron is 1.1 million square meters, 49 boarding bridges, and cargo planes are parked With a ping of 52,000 square meters, it can meet the guarantee needs of an annual passenger throughput of 33 million person-times, cargo and mail throughput of 805,000 tons, and flight movements of 260,000. By the end of 2015, the airport had 127 seats and 235 routes, including 196 domestic routes.   
In 2017, the airport handled 35.57 million passengers, an increase of 12.6% year-on-year, 589,000 tons of cargo and mail, an increase of 20.8% year-on-year, and 271,000 flights, an increase of 8% year-on-year.   On November 29, 2019, the direct route from Hangzhou to Cairo, Egypt was officially launched.   At the end of December 2019, the annual passenger throughput of Hangzhou Xiaoshan International Airport exceeded 40 million.   Since 2019, the number of inbound passengers at Hangzhou Xiaoshan International Airport has reached 5.45 million, a year-on-year increase of 5.5%.   . In 2019, the throughput ranked tenth in the country.  
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