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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.

Dongtou District, the municipal district of Wenzhou City, Zhejiang Province, is one of the four main urban areas of Wenzhou City. It is called the middle boundary in ancient times. It is located on the coast of southern Zhejiang and outside the Oujiang Estuary. It consists of 103 islands and 259 islands and reefs. The geographical coordinates are between 120 °59 °45 "- 121 °15" 58 "east longitude and 27 °41" 19 "- 28 °01" 10 "north latitude. Dongtou District has a land area of 172.50 square kilometers and a sea area of 2652 square kilometers. The district now has jurisdiction over the five streets of Beili, Dongping, Yuanjue, Neon Island and Lingkun, Damen Town and Luxi Township, with a registered population of 154000 and a permanent resident population of 129100 in 2015. On December 12, 2018, it was named as the second batch of practice and innovation base of "Green Water and Green Mountain is Jinshan and Silver Mountain".
Airport In Dongtou District - Wenzhou Longwan International Airport
Wenzhou Longwan International Airport (Wenzhou Longwan International Airport, IATA: WNZ, ICAO: ZSWZ), located in Longwan District, Wenzhou City, Zhejiang Province, China, is on the verge of the East China Sea and is about 22 kilometers away from the city center. It is a 4E-class civil international airport and a national first-class airline. Ports, China's domestic second-class civil airports.  
Wenzhou Longwan International Airport was formerly known as Wenzhou Yongqiang Airport, which was officially opened to navigation on July 12, 1990, and changed to its current name in March 2013.   In November 2011, the construction of the T2 terminal of the airport officially started.   On August 9, 2013, the new runway of the airport passed the inspection.  
As of June 2018, Wenzhou Longwan International Airport has two terminals, namely T1 (international) and T2 (domestic), with a total area of ​​129,500 square meters; it has an apron of 534,000 square meters and 59 parking positions. There are 29 airport bridges; a runway with a length of 3,200 meters and a width of 45 meters (including a shoulder of 60 meters), which can meet the capacity requirements of an annual passenger throughput of 15 million passengers; 125 operating routes, including 16 international (regional) routes.   As of November 2018, the airport has accumulatively served 133 cities, including 29 international (regional) cities.  
In 2017, the passenger throughput of Wenzhou Longwan International Airport was 9.2856 million passengers, a year-on-year increase of 13.4%; the cargo and mail throughput was 75,500 tons, a year-on-year decrease of 2.9%; No. 31, 42.   
In 2018, the annual passenger throughput of Wenzhou Airport exceeded 10 million for the first time, successfully entering the ranks of large international airports with tens of millions. In 2019, Wenzhou Airport completed 92,300 flight movements, 12,291,700 passenger throughput, and 81,100 tons of cargo and mail throughput, a year-on-year increase of 6.87%, 9.56%, and 1.14%, respectively.  
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