• Tucson
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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.

Red Granite District is under the jurisdiction of Zunyi City, Guizhou Province, which was originally Zunyi City at the county level. Located between 27 °33 miles north latitude 27 °48 'north latitude and 106 °41 degrees east longitude 107 °33' east longitude, located in the north of Guizhou Province, leaning on Loushan in the north and facing Wujiang River in the south, it is located between Chongqing and the provincial capital Guiyang, 323 kilometers north of Chongqing and 147 kilometers south of Guiyang. It has jurisdiction over 12 towns and 8 streets. It is the political, economic, cultural center and transportation hub of Zunyi City. There are Han, Miao, Gelao, Tujia and other ethnic groups, with the Han nationality as the majority, with a total population of 700000 (2015) and a land area of 624 square kilometers. The District people's Government is stationed on Xinhua Road. In 2012, the gross domestic product of Red Granite District was 22.149 billion yuan. Among them: 932 million yuan for the primary industry and 66.0 yuan for the secondary industry
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