• Tucson
  • Jiuyuan District

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.

Jiuyuan District is a municipal district of Baotou City, Inner Mongolia Autonomous region. It is located in the west of Inner Mongolia Autonomous region, adjacent to Donghe District and Shiguai District to the east, Qingshan District and Kundulun District to the north, Daqingshan to the north and the Yellow River to the south. It is located at the junction of Tumot Plain and Hetao Plain. Located in the core area of "Hubao Yinyu" economic zone and "Hubao Eyu" urban agglomeration, it is the location of Baotou new urban central area. Jiuyuan District has jurisdiction over 1 sappan wood, 3 towns, 4 subdistrict offices and 2 industrial parks. With a total area of 734 square kilometers and a total population of 300000 in 2018, it is composed of 19 ethnic groups, including Han, Mongolian, Hui and Manchu, among which Mongolians mainly live in Aga such as Taisumu in the west.
Airport In Jiuyuan District - Baotou Donghe Airport
Baotou Donghe Airport (Baotou Donghe Airport, IATA: BAV, ICAO: ZBOW), located at Erliban Road, Tianjiao Street, Donghe District, Baotou City, Inner Mongolia Autonomous Region, China, 23 kilometers northwest of the main urban area of ​​Baotou, is a 4C-level international feeder airport. A first-class air port open to the outside world   .
In 1934, Hailanpao Airport was completed and opened to navigation   In 1956, Hailanpao Airport was renamed Baotou Erliban Airport; in 2006, the runway of Baotou Erliban Airport was extended to 2800 meters; in March 2018, Baotou Erliban Airport was renamed Baotou Donghe Airport   .
As of February 2022, Baotou Donghe Airport has a total of 2 terminal buildings, of which the T1 terminal (international) covers an area of ​​11,000 square meters, the T2 terminal (domestic) covers an area of ​​30,000 square meters; the area of ​​the civil aviation station is 30,000 square meters meters, with 15 seats, including 3 class B seats, 11 class C seats, and 1 class D seat; the runway is 2,800 meters long and 45 meters wide, which can meet the annual passenger throughput of 4 million passengers need   [twenty two]  .
In 2021, Baotou Donghe Airport will handle a total of 1,336,911 passengers, a year-on-year increase of 13.4%, ranking 82nd in the country; cargo and mail throughput will be 2,927.0 tons, a year-on-year decrease of 28.8%, ranking 86th in the country; aircraft movements will reach 14,320 Flights, a year-on-year increase of 12.1%, ranking 108th in the country [twenty one]  .
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