• Tucson
  • Jingxian County

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.

Jingxian County, which belongs to Hengshui City, Hebei Province, is located in the southeast of Hebei Province, east of Hengshui City, close to Dezhou City, Shandong Province, the west bank of the Grand Canal, and is located in the economic development area around Beijing and Tianjin, around the Bohai Sea, and the triangle economic center of Beijing, Tianjin, Shijiazhuang and Jinan, with a total area of 1183 square kilometers and 1.25 million mu of arable land. It is a "Nanfang" economic region for Hebei Province to implement the strategy of "one line and two carriages" in the Eleventh five-year Plan. Since 2007, Jingxian has been named as "China Rubber and plastic Pipe Industry Base", "China Iron Tower Manufacturing Base" and "China forklift fork Manufacturing Base" by relevant national industry associations. In 2013, there were 3 national key cultural relics protection units in Jingxian County (Jingzhou Shili Pagoda, Feng's Tomb Group, Gao's Tomb Group) and 1 provincial key cultural relics protection unit (Zhou Yafu Tomb).
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