• Tucson
  • Shifang

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.

Shifang, a county-level city under the jurisdiction of Sichuan Province and hosted by Deyang City, is located in the Chengdu Plain in the hinterland of Sichuan Basin, adjacent to Mianzhu City and Jingyang District in the east, Guanghan City in the south and Pengzhou City in the west, belonging to the subtropical humid climate zone; it has jurisdiction over 2 streets and 14 towns with a total area of 864 square kilometers and a total population of 430000 in 2017. Shifu once enjoyed the reputation of "Yuji fairy hometown" because of the footprints of Dayu. Li Bing, a famous hydrologist in the Qin Dynasty, once treated the water here and died here. Shifang is also the hometown of Ma Daoyi, the eighth ancestor of Southern Zen Buddhism, and the sealed place of Yongya, a famous general of Han Dynasty, so Shifang City is also known as Yongcheng. The main natural landscapes of Shifang are Fenghua Mountain, Qingniutuo and so on. On December 14, 2017, Shifang was awarded the fourth civilized Model City of Sichuan Province. In November 2018, it was confirmed by the Ministry of Science and Technology
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