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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.

Jianning County, which belongs to Sanming City, Fujian Province, is located in the northwest of Fujian Province, in the middle of Wuyi Mountains, Taining in the east, Mingxi and Ninghua in the south, and Nanfeng, Guangchang and Lichuan in Jiangxi Province in the northwest. As of June 2018, Jianning County has jurisdiction over 4 towns, 5 townships, 92 administrative villages and 7 communities, covering an area of 1718 square kilometers, with a total population of 160000. Jianning County was located in the first year of Zhongxing in the Southern Tang Dynasty (958), with undulating hills and dense vegetation. Jinchuan Mountain, with an elevation of 1858 meters above sea level, is the highest peak in Fujian and an important part of the World Geopark. There are Minjiangyuan National Nature Reserve and National Forest Park; the main traffic trunk lines are 207,309 provincial highways and Jingfu Expressway Jiantai Expressway Link, Changfu Railway. In 2017, the completed site of Jianning County
Airport In JianNing County - Sanming Sha County Airport
Sanming Shaxian Airport (Sanming Shaxian Airport, IATA: SQJ, ICAO: ZSSM), located in the North District of Jinguyuan, Shaxian District, Sanming City, Fujian Province, China, about 32 kilometers away from the center of Sanming, is a 4C-level civil transport airport   .
Sanming Shaxian Airport was officially completed and opened to navigation on March 7, 2016; it was named Sanming Shaxian Airport   .
According to information on the airport's official website in June 2019, Sanming Shaxian Airport has a terminal building of T1 (domestic in China) with a total area of ​​11,700 square meters; there is a runway with a length of 2,600 meters and 5 parking spaces   . As of October 2020, 9 domestic cities in China have been opened.  
In 2020, due to the impact of the global epidemic, the passenger throughput of Sanming Shaxian Airport was 249,700, a year-on-year decrease of 2.3%; the cargo and mail throughput was 1,000 tons, a year-on-year increase of 259.2%; the number of takeoffs and landings was 3,000, a year-on-year increase of 5.1% %; respectively ranked 177th, 159th and 190th in China   .
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