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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.

Cao County is a county under the jurisdiction of Heze City, Shandong Province, known as Cao Zhou in ancient times, located in the southwest of Shandong Province, at the junction of eight counties of Shandong and Henan provinces, Shangqiu and Civil Rights to the south, Heze and Dingtao to the north, Shan County and Chengwu to the east, Dongming and Lankao to the west; with a total area of 1969 square kilometers, it has jurisdiction over 5 subdistrict offices, 22 townships and a total population of 1694064 in 2017. Ming Hongwu four years (1371), Caozhou down to Caoxian, after the restoration of Caozhou, Caoxian this name is still in use today. He has won honors such as "hometown of asparagus in China", "hometown of paulownia processing in China", "top 100 counties in China's food industry", "advanced counties in plain greening in China", and the first batch of large-scale cloned cattle experimental bases in China. In history, a number of outstanding figures emerged successively, such as Yi Yin, prime minister of the Shang Dynasty, Wu Qi, a strategist in the warring States period, and Han Dynasty agronomist Kui Shengzhi.
Airport In Caoxian county - Heze Peony Airport
Heze Mudan Airport (Heze Mudan Airport, IATA: HZA, ICAO: ZSHZ), referred to as "Mudan Airport", is located near Huangzhuang Village, Menghai Town, Dingtao District, Heze City, Shandong Province, China, about 25 kilometers away from the center of Heze in the northwest. 4C level domestic feeder airport   .
On January 24, 2018, Heze Civil Airport was named "Heze Mudan Airport"; on August 19, 2020, the place name code of Heze Mudan Airport was approved   ; On January 18, 2021, the test flight of Heze Mudan Airport was successful   ; On April 2, 2021, Heze Mudan Airport officially opens   .
As of April 2021, the terminal building of Heze Mudan Airport has an area of ​​10,916 square meters, with 4 boarding bridges; 9 C-class seats on the civil aviation station; the runway is 2,600 meters long and 45 meters wide; it can meet the annual passenger throughput 900,000 passengers, 6,500 tons of cargo and mail throughput, and 9,184 aircraft takeoffs and landings   .
In 2021, Heze Mudan Airport will handle a total of 367,081 passengers, ranking 152nd in the country; cargo and mail throughput of 25.5 tons, ranking 203rd in the country; 3,600 aircraft movements, ranking 183rd in the country   .
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