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  • Quanshan District

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.

Quanshan District belongs to Xuzhou City, Jiangsu Province, located in the southwest of Xuzhou City, holding Yunlong Lake and Yunlong Mountain, named after Quanshan National Forest Park. Quanshan District has the only national university science and technology park in Jiangbei region of Jiangsu Province and Huaihai Economic Zone-National University of Mining and Technology Park of China University of Mining and Technology, as well as natural and cultural landscapes such as the Memorial Hall of the Martyrs of the Huai-Hai campaign, the Han Tomb in Lali Mountain, and the Han Portrait Stone Art Museum. Quanshan District is the economic, educational and medical center of Xuzhou and one of the core areas of Xuzhou mega-city. It is also the national advanced area of scientific and technological progress, the national project pilot area of strong intellectual property rights, the advanced talent area of Jiangsu Province, and the innovative pilot area of Jiangsu Province. Quanshan District should take the lead in building a strong area of modern service industry in the north of the Yangtze River and march into the first-class urban areas of Jiangsu Province. In 2015, Quanshan District became the first place in Xuzhou after the Gulou District of Xuzhou.
Airport In Quanshan District - Xuzhou Guanyin International Airport
Xuzhou Guanyin International Airport (Xuzhou Guanyin International Airport, IATA: XUZ, ICAO: ZSXZ), located in Shuanggou Town, Suining County, Xuzhou City, Jiangsu Province, 45 kilometers away from Xuzhou City, is a 4E-level civil international airport   , is the central airport of Xuzhou Metropolitan Circle and Huaihai Economic Zone.  
Xuzhou Guanyin International Airport was officially opened to navigation on November 8, 1997; it was named Xuzhou Guanyin Airport   ;Renamed to Xuzhou Guanyin International Airport on January 6, 2016   ; On June 8, 2018, the second phase of the expansion project was completed.  
As of January 2019, Xuzhou Guanyin International Airport has two terminals, T1 (international and Hong Kong, Macao and Taiwan) and T2 (China domestic), with a total area of ​​58,000 square meters; there is a runway with a length of 3,400 meters; the apron is 6.3 10,000 square meters, 9 seats   ; As of October 2019, a total of about 39 domestic and international routes have been opened in China   , 39 navigable cities.  
In 2019, the passenger throughput of Xuzhou Guanyin International Airport was 3,005,875 passengers, a year-on-year increase of 19.3%; the cargo and mail throughput was 12,068 tons, a year-on-year increase of 19.9%; the number of take-offs and landings was 49,648, a year-on-year increase of -%; ranking 55th in China respectively , 52nd, and 60th.  
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