• Tucson
  • Chengxian 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.

Chengxian, which belongs to Longnan City, Gansu Province, is located in the south of Gansu Province and the northeast of Longnan City. Chengxian was called Chengzhou in ancient times, Chengzhou in the Western Wei Dynasty and Jiangzhou as a county in the Ming Dynasty. Cheng County has jurisdiction over 14 towns and 3 townships, 15 neighborhood committees and 245 villagers' committees, with a total area of 1676.54 square kilometers, a total population of 269800 and a resident population of 246800, of which the urban population is 120200, and the urbanization rate is 48.7% (2018). Chengxian County is located in the residual vein of the West Qinling Mountains, the terrain is high in the northwest, low in the southeast, between 750m and 2377 meters above sea level, is a warm temperate semi-humid climate, four distinct seasons, moderate cold and warm, known as "Longyou small Jiangnan", "Longyou granary". Chengxian County is rich in natural resources, including mineral resources, water resources, biological resources and so on.
Travel Notes In Chengxian County
Travel Asks In Chengxian County
Travel Asks In Chengxian County