• Tucson
  • Zhangxian 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.

Zhangxian, which belongs to Dingxi City, Gansu Province, has a poor name because of its important strategic position and is regarded as the "western barrier" of the Han Dynasty. Tianshi changed its name to Wuyang County in the second year of the Tang Dynasty, and changed its name to Zhangxian County during the Hongwu period of the Ming Dynasty. Zhangxian County is located in the central and southern part of Gansu Province, located in the transitional zone between the West Qinling Mountains and the Loess Plateau, Wushan County in the east, Zhuoni County in the west, Minxian County in the south, Longxi County and Weiyuan County in the north, with a total area of 2164.4 square kilometers and a population of 205876. Among them, non-agricultural population 19056 (2010), is a national poverty alleviation and development work key county. Zhangxian is "the hometown of broad beans in China" and "the hometown of Hippophae rhamnoides in China". It was named "Green County in China" by the China Environmental Protection Federation in August 2008 and was named by China in 2005.
Travel Guides In Zhangxian County
Travel Sights In Zhangxian County
Travel Notes In Zhangxian County