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  • Jiuquan City

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.

Jiuquan, a prefecture-level city of Gansu Province, is located between Altun Mountain, Qilian Mountain and Mazong Mountain at the western end of Hexi Corridor in the northwest of Gansu Province, between latitude 38 °09 "42 °48" north and longitude 92 °20 "100 °20'E. it has been the traffic fortress of the Central Plains and the northeast leading to Xinjiang and the western region since ancient times. In the north, except for a small part of Mongolia, most of it is connected with Alashan League in Inner Mongolia and Xinjiang Uygur Autonomous region to the west. The southern boundary of Qinghai Haixi Mongolian Autonomous Prefecture and Haibei Tibetan Autonomous Prefecture is adjacent to Zhangye City in the east, with a total area of 192000 square kilometers, accounting for 42% of the area of Gansu Province. Jiuquan is one of the four counties in Hexi in the Han Dynasty and an important town of the Silk Road. The terrain is high in the south and low in the north, tilting from southwest to northeast, Qilian main peak from east to west, Gaolai Mountain,
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Travel Asks In Jiuquan City