• Tucson
  • Yanchuan 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.

Yanchuan County, which belongs to Yan'an City, Shaanxi Province, is located in the north of Shaanxi Province, northeast of Yan'an City, facing the Yellow River to the east and Yonghe County of Shanxi Province to the east, Qingjian County of Yulin City to the north, Zichang County to the northwest, Baota District to the west and Yanchang County to the south. 80 kilometers away from Yan'an, the county is 74.25 kilometers long from east to west and 51.5 kilometers wide from north to south. Between 109o 3620 "- 110o 2644" east longitude, 36o 3715m / m 37 °5 & #39;55" north latitude, with a total area of 1985 square kilometers. Yanchuan is the hometown of national modern folk art named by the Ministry of Culture. Li Kui, the only literary champion in northern Shaanxi, and Li Lulu, a poetess of the Qing Dynasty, are all in Yanchuan. Yanchuan writers represented by Lu Yao are famous in the Chinese literary world; paper-cut, cloth painting,
Travel Guides In Yanchuan County
Travel Notes In Yanchuan County