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  • Xialu 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.

The landing area is one of the four urban areas of Huangshi City, which is located in the hinterland of Huangshi city center, bordered by Huangshi Port and Xisai Mountain in the east, Tieshan in the west, Daye in the south and Ezhou in the north. Now it has jurisdiction over three subdistrict offices of new Xialu, Old Xialu and Dongfangshan, with a total area of 37 square kilometers and a population of 110000 in 2010. It is the transportation hub of Huangshi City, an important metallurgical machinery and building materials industry base and an industry, trade and tourism city with good development prospects. There are large state-owned enterprises in the area, such as Daye Nonferrous Metals Company, Chinalco Copper Strip Company, Huangshi Textile Machinery Factory, Dongfang Pipe Company of Xinye Iron and Steel Group, Hubei Coalfield 182 Geology and other large state-owned enterprises, which are the most obvious transportation and resource advantages in Huangshi City.
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