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Atlanta (/ætˈlæntə/ at-LAN-tə) is the capital and most populous city of the U.S. state of Georgia. It is the seat of Fulton County, the most populous county in Georgia, but its territory falls in both Fulton and DeKalb counties. With a population of 498,715 living within the city limits, it is the eighth most populous city in the Southeast and 38th most populous city in the United States according to the 2020 U.S. census. It is the core of the much larger Atlanta metropolitan area, which is home to more than 6.1 million people, making it the eighth-largest metropolitan area in the United States. Situated among the foothills of the Appalachian Mountains at an elevation of just over 1,000 feet (300 m) above sea level, it features unique topography that includes rolling hills, lush greenery, and the most dense urban tree coverage of any major city in the United States.

Atlanta was originally founded as the terminus of a major state-sponsored railroad, but it soon became the convergence point among several railroads, spurring its rapid growth. The largest was the Western and Atlantic Railroad, from which the name "Atlanta" is derived, signifying the city's growing reputation as a major hub of transportation. During the American Civil War, it served a strategically important role for the Confederacy until it was captured in 1864. The city was almost entirely burnt to the ground during General William T. Sherman's March to the Sea. However, the city rebounded dramatically in the post-war period and quickly became a national industrial center and the unofficial capital of the "New South". After World War II, it also became a manufacturing and technology hub. During the 1950s and 1960s, it became a major organizing center of the American Civil Rights Movement, with Martin Luther King Jr., Ralph David Abernathy, and many other locals becoming prominent figures in the movement's leadership. In the modern era, Atlanta has stayed true to its reputation as a major center of transportation, with Hartsfield–Jackson Atlanta International Airport becoming the world's busiest airport by passenger traffic in 1998 (a position it has held every year since, with the exception of 2020 as a result of the worldwide COVID-19 pandemic).

With a gross domestic product (GDP) of $406 billion, Atlanta has the tenth largest economy of cities in the U.S. and the 20th largest in the world. Its economy is considered diverse, with dominant sectors in industries including transportation, aerospace, logistics, healthcare, news and media operations, film and television production, information technology, finance, and biomedical research and public policy. The gentrification of some its neighborhoods, initially spurred by the 1996 Summer Olympics, has intensified in the 21st century with the growth of the Atlanta Beltline. This has altered its demographics, politics, aesthetics, and culture.

Tianjin, referred to as Tianjin, is the provincial administrative region, municipality directly under the Central Government, national central city and mega city of the people's Republic of China, and the economic center of the area around the Bohai Sea as approved by the State Council. By 2018, there were 16 districts under the jurisdiction of the city, with a total area of 11916.85 square kilometers, a built area of 1007.91 square kilometers, a resident population of 15.596 million, an urban population of 12.9681 million, and a urbanization rate of 83.15%. Tianjin is located in North China, the northeast of the North China Plain and the lower reaches of the Haihe River Basin, facing the Bohai Sea to the east. It is the confluence and estuary of the five major tributaries of the Haihe River, namely, the South Canal, the Ziya River, the Daqing River, the Yongding River and the North Canal. Tianjin is the main node of the China-Mongolia-Russia Economic Corridor and the Maritime Silk Road.
Airport In Tianjin - Tianjin Binhai International Airport
Tianjin Binhai International Airport (Tianjin Binhai International Airport, IATA: TSN, ICAO: ZBTJ), located in Dongli District, Tianjin, China, 13 kilometers away from the city center, is a 4E-level civil international airport     , is China International Aviation Logistics Center   , an airport with international scheduled flights, a national first-class air port open to the outside world, and one of China's major air cargo centers.    
Tianjin Binhai International Airport, formerly known as Tianjin Zhangguizhuang Airport, was first built in November 1939; it was officially opened to navigation in 1950; the first phase of the expansion project was completed in 2007; the second phase of the expansion project was completed in August 2014.   
According to the official website of the airport in August 2017, Tianjin Binhai International Airport has two terminal buildings, namely T1 (international and regional) and T2 (domestic), with a total construction area of ​​364,000 square meters and a warehouse area of ​​74,000 square meters; It has 2 runways with lengths of 3600 meters and 3200 meters respectively; 59 seats.   By the end of 2016, the airport had opened 180 air routes and 132 navigable cities.  
In 2019, Tianjin Airport handled 23.813 million passengers, a year-on-year increase of 0.9%; cargo and mail throughput was 226,000 tons, a year-on-year decrease of 12.6%; and transported 167,000 vehicles, a year-on-year decrease of 6.4%.  
In October 2020, it was rated as an advanced group in the national transportation system to fight against the new crown pneumonia epidemic.  
Travel Notes In Tianjin
Tianjin impression. . . . . . memorable
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Extraordinary Gengzi Year Simple Leting Seaside and Lion City Tour
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