• Philadelphia
  • Helan County

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.

Helan County (Pinyin: Helan Xian), under the jurisdiction of Yinchuan City, Ningxia Hui Autonomous region, is located in the northern part of Ningxia Hui Autonomous region, bought Lian County in the Western Han Dynasty, and changed its name to Helan County in 1941. As of 2013, Helan County covers an area of 1599 square kilometers. As of 2018, it has jurisdiction over 4 towns, 1 township, 3 fields and 1 management committee. In 2016, the total population of Helan County (resident population) was 255995. Helan County is located in the northwest inland of China's Loess Plateau, in the middle of the Qingtong Gorge irrigation area in Yinchuan Plain, mountainous area in the west and plain in the east. The basic characteristics of the topography trend are high in the southwest and low in the northeast, with a distorted surface tilting from southwest to northeast. The whole area is mainly composed of western mountain and eastern plain.
Travel Guides In Helan County
Travel Notes In Helan County
Yinchuan tour in May 2013
It was almost Mother's Day that year, and I took a day off on Sunday to spend four memorable days with my two mothers. After a woman gets married, she
[Ningxia Travel Guide] Summer vacation is coming, have you thought about where to go? look here......
Take you to explore the Saishang Jiangnan in the desert One mountain, one world, one river and one horizon, the four seasons in Ningxia have beauty be
Warm sun in winter, meeting the rock paintings of Helan Mountain
In winter, people often think of ice and snow, cold wind blowing, but today's Helan Mountain is very quiet and beautiful illuminated by the warm sun i
The movement and stillness of Helan Mountain-- blue sheep and petroglyphs
2017-09-07 One move--blue sheep: It is a national second-class protected animal, and its coat color is the same as that of Helan Mountain, which is th