• Tucson
  • Baoshan City

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.

Baoshan, a prefecture-level city under the jurisdiction of Yunnan Province, is located in the southwest of Yunnan Province, bordering Dali Bai Autonomous Prefecture and Lincang City in the east, Nujiang Lisu Autonomous Prefecture in the north, Dehong Dai Jingpo Autonomous Prefecture in the west, and Myanmar in the northwest and due south. The border is 170km long and covers a total area of 19600 square kilometers, of which mountain and semi-mountainous areas account for about 92 per cent. Baoshan, located in the middle of western Yunnan, is a necessary place for China to go to South Asia, Southeast Asia and even European countries. Tengchong is one of the important birthplaces of modern industry and commerce in Yunnan. The terrain is high in the north and low in the south, and most areas in the territory have a subtropical monsoon climate. Lignite reserves and geothermal resources are very rich. It is the largest small-grain coffee planting base in the world and the largest horseradish, Dendrobium, walnut and safflower Camellia oleifera planting base in the country.
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Tengchong, the paradise of love at first sight
Tengchong, I fell in love with you at first sight For love at first sight, Whether it is a person or an object, I never believed it, As time travel