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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.

Longli County, which belongs to Qiannan Buyi and Miao Autonomous Prefecture, Guizhou Province, is located in the hinterland of central Guizhou, the middle part of Miaoling Mountains, and the northwest of Qiannan Buyi and Miao Autonomous Prefecture. The hills, low mountains, Zhongshan and river valleys are arranged alternately in the north and south, and the county seat is 1080 meters above sea level. It is bordered by Guiding County and Fuquan County to the east, Huishui County to the south, and Guiyang City to the west and north. It belongs to the humid climate of subtropical monsoon with an annual average temperature of 14.8 ℃. At the end of 2012, the total population of the county was 224266, including Han, Buyi, Miao and other ethnic groups, including 91754 ethnic minorities. The famous scenic spots in the county are Longjiashan Forest Park and Guanshan. In September 2018, the people's Government of Guizhou Province agreed to withdraw Longli County from the poverty-stricken county.
Travel Sights In Longli Xian
Travel Notes In Longli Xian
2019.October National Day walk in Guizhou Longli oil painting prairie
Longli Oil Painting Grassland is unique in its undeveloped tranquility and nature. No noise, no publicity, so that everything looks original. The scen
Rural Tour in Central Guizhou·Longli County Chaxiang Village │ Prickly pear yellow all over the mountain, a beautiful picture of autumn harvest
autumn is a season of romance it hides in every corner used to the hustle and bustle of the city Come to the village to enjoy the autumn scenery L
Lazy - between the mountains and the sea in the southwest (North Sea Taotie + Guizhou self-driving 9 days) (2)
In the autumn of 2018, between the summer vacation and the National Day, a walk between the sea and the mountains will take place. Features of the tr
Taking advantage of the sunshine, I sneaked to Longli oil painting prairie
I accidentally encountered a rare sunny day in winter, so I made an appointment with my friends and came to the Longli oil painting prairie that I had