• Tucson
  • Sangzhi County

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.

Sangzhi County is the hometown of Marshal he long and the starting point of the long March of the second Red Front Army, which belongs to Zhangjiajie City, Hunan Province, a new city for international tourism. The county has a total area of 3474 square kilometers, with 28 ethnic groups and a total population of 380000. Sangzhi is a green ocean. It has the first Badagongshan primeval forest in China and the first national nature reserve in Hunan Province, which has been included in China's "Man and Biosphere Reserve (MAB)" and China's "one of the 17 key areas of biodiversity of global significance", as well as one of the 200 important ecological regions in the world.
Airport In Sangzhi County - Zhangjiajie Hehua International Airport
Zhangjiajie Hehua International Airport (Zhangjiajie Hehua International Airport; IATA: DYG, ICAO: ZGDY), is located in Hehua Village, Yongding District, Zhangjiajie City, Hunan Province, China, on the south side of Lishui River. About 10 kilometers east of Zhangjiajie urban area, it is a 4D-level trunk airport    , the second largest international airport in Hunan Province   .
Zhangjiajie Hehua International Airport was officially opened to navigation on August 18, 1994; it was formerly known as Dayong Airport, which opened to navigation on December 22, 1993. It was renamed Dayong Zhangjiajie Airport in 1994 and Zhangjiajie Hehua Airport on October 31, 1995. In September 2017, it was renamed Zhangjiajie Hehua International Airport   .
According to the information on the airport's official website in June 2019, Zhangjiajie Hehua International Airport has a terminal building of T2 (China's domestic and international Hong Kong, Macao and Taiwan) with a total area of ​​46,500 square meters; there is a runway with a length of 2,600 meters and 21 parking spaces ; It can meet the annual passenger throughput of 5 million person-times, cargo and mail throughput of 19,000 tons, and aircraft take-off and landing of 45,000 sorties   . As of April 2019, a total of 28 domestic and international navigation cities in China have been opened   .
In 2020, due to the decline in the impact of the global epidemic, the passenger throughput of Zhangjiajie Hehua International Airport was 1,278,400, a year-on-year decrease of 55.5%; the cargo and mail throughput was 1,100 tons, a year-on-year decrease of 37.6%; the number of takeoffs and landings was 13,500, a year-on-year decrease of 47.0% %; ranking 75th, 112th and 104th in China respectively. In 2019, they ranked 58th, 99th and 78th in China respectively   .
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