• Tucson
  • Shulan

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.

Shulan City, which belongs to Jilin City, Jilin Province, is located in the north-central part of Jilin Province, with geographical coordinates of 43 °51 latitude 44 °38 'north latitude and 127 °45' east longitude. Jilin Province under the jurisdiction of county-level cities, entrusted to Jilin City escrow. It is bordered by Longtan District and Jiaohe City of Jilin City in the south, Jiutai City across the Songhua River in the west, and Wuchang City in Heilongjiang Province in the northeast. The city is 105km long from east to west and 77km wide from north to south, with a total area of 4557.05 square kilometers. With a total population of 656000 (2012), it has jurisdiction over 5 streets, 10 towns, 5 townships and 1 provincial economic development zone. In 2012, the gross domestic product of Shulan City reached 18.55 billion yuan. The first batch of national experimental and demonstration areas for sustainable agricultural development. In September 2018, in the sixteenth session
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