• Tucson
  • Da Hinggan Ling Prefecture

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.

The Daxing'anling region, located in the northwest of Heilongjiang Province, the northeast of Inner Mongolia Autonomous region and the northeast slope of the Daxinganling Mountains, is the northernmost prefecture-level administrative region in China; it belongs to the cold temperate continental monsoon climate It has jurisdiction over 4 municipal districts, 1 county-level city and 2 counties, with a jurisdiction area of 83000 square kilometers (Gagdachi District and Songling District under its jurisdiction belong to the Inner Mongolia Autonomous region, covering an area of 18200 square kilometers, accounting for 21.9% of the total area). The registered population is 439300. The Daxing'anling area is one of the national key state-owned forest areas and one of the main distribution areas of natural forests. it is also the only bright coniferous forest region in the cold temperate zone and the only remaining biological gene pool in the cold temperate zone in China. A large number of large and medium-sized gold deposits such as Mohe sand Baosyan gold deposit and Xinlin Tayuan lead-zinc deposit have been discovered in Delbugan and Daxinganling metallogenic belts.
Airport In Da Hinggan Ling Prefecture - Daxinganling Oroqen Airport
Da Hinggan Ling Oroqen Airport (English: Da Hinggan Ling Oroqen Airport, IATA: JGD, ICAO: ZYJD), formerly known as "Chigasian Airport (Chigasian Airport)", is located in Guangming Street, Jiagedaqi District, Daxinganling District, Heilongjiang Province, China [twenty four]  , 8 kilometers away from the urban area of ​​Jiagedaqi District in the north, is a 4C-level civil feeder airport   .
The predecessor of Oroqen Airport in Greater Khingan Mountains was a general-purpose airport, and it was the Jiagedaqi Aviation Forest Ranger Station; on September 6, 2009, the Jiagedaqi Aviation Forest Ranger Station began the reconstruction and expansion project; on June 18, 2012, the Jiagedaqi Gaxian The airport officially opened civil aviation business   ; On February 25, 2021, Jiageda Qigaxian Airport was officially renamed Daxinganling Oroqen Airport   .
According to the official website of the Heilongjiang Provincial Airport Management Group in 2021, the Daxinganling Oroqen Airport has a terminal building with a construction area of ​​4,870 square meters; there are 3 C-class seats on the civil aviation platform; there are 2 runways, of which the civil aviation runway is 2,300 meters long. 45 meters wide; the navigable runway is 500 meters long and 30 meters wide   .
In 2019, Jiageda Qigaxian Airport (now Daxinganling Oroqen Airport) completed a total of 182,783 passenger throughputs, a year-on-year increase of 17.1%, ranking 193rd in the country; cargo and mail throughput was 97.4 tons, a year-on-year increase of 32.4%, ranking first in the country. No. 190; 3,558 aircraft movements, an increase of 8.4% year-on-year, ranking No. 184 in the country   .
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