• Tucson
  • Jainca 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.

Jianzha County is located in the southeast of Qinghai Province and in the north of Huangnan Tibetan Autonomous Prefecture. Most of Jianzha County is bounded by the Yellow River and Hualong County in the northeast, Xunhua County in the southeast, Guide County in the west and Tongren County in the south. The county is about 87 kilometers from north to south and 48 kilometers from east to west, with a total area of 1714 square kilometers. As of 2011, the total population was 54300, of which 40, 000 were ethnic minorities, with Tibetans accounting for about 62% of the total population. The county has jurisdiction over 3 towns and 6 townships. Jianzha County has profound religious and cultural accumulation, which is the birthplace of Tibetan Buddhism. Kambra National Geopark is famous for its "Danxia" scenery composed of red gravel. There are three major monasteries in the park: Nanzong Temple, Nigu Temple and Nanzongza Temple. It is the only religious place in Qinghai Province where monks, secrets and nuns coexist.
Travel Sights In Jainca County
Travel Notes In Jainca County
2020 Self-Driving Westward Journey Part 5: Folk Music Xunhua with Xining Jianza Colleagues
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