• Tucson
  • Tianjin

Tucson (/ˈtuːsɒn, tuːˈsɒn/; Spanish: Tucson, O'odham: Cuk-Ṣon) is a city in and the county seat of Pima County, Arizona, United States, and is home to the University of Arizona. It is the second largest city in Arizona behind Phoenix, with a population of 542,629 in the 2020 United States census, while the population of the entire Tucson metropolitan statistical area (MSA) is 1,043,433. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA). Both Tucson and Phoenix anchor the Arizona Sun Corridor. The city is 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border. Tucson is the 34th largest city and the 53rd largest metropolitan area in the United States (2014).

Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita south of the city, and South Tucson in an enclave south of downtown. Communities in the vicinity of Tucson (some within or overlapping the city limits) include Casas Adobes, Catalina Foothills, Flowing Wells, Midvale Park, Tanque Verde, Tortolita, and Vail. Towns outside the Tucson metro area include Benson to the southeast, Catalina and Oracle to the north, and Green Valley to the south.

Tucson was founded as a military fort by the Spanish when Hugo O'Conor authorized the construction of Presidio San Agustín del Tucsón in 1775. It was included in the state of Sonora after Mexico gained independence from the Spanish Empire in 1821. In 1853, the United States acquired a 29,670 square miles (76,840 km2) region of present-day southern Arizona and southwestern New Mexico from Mexico under the Gadsden Purchase. Tucson served as the capital of the Arizona Territory from 1867 to 1877. Tucson was Arizona's largest city by population during the territorial period and early statehood, until it was surpassed by Phoenix by 1920. Nevertheless, population growth remained strong during the late 20th century. In 2017, Tucson was the first American city to be designated a "City of Gastronomy" by UNESCO.

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
Beijing-Tianjin Walking Baby Story, a precise harvest for educational anxiety
Education Anxiety! Recently, a popular educational documentary "Childhood in a Foreign Land" deeply hit the anxiety of countless parents, including m
Gengzi Yangchun Traveling to Panshan
Foreword: When people get old, the biggest feature is the decline of physical function and the increase of nostalgia. In the dead of night, people oft
Late Autumn Beijing, Tianjin Ten-Day Tour
At the end of October 2018, the daughter of my classmate and good friend in Singapore just went to Beijing for exchange and study. Their whole family
Tianjin impression. . . . . . memorable
I have been to all the four major municipalities directly under the central government in China, but only Tianjin has not had a good time. I have been