• Tucson
  • Erguna

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.

Erguna is a county-level city under the jurisdiction of Hulunbuir City, Inner Mongolia Autonomous region. it is located at the northwest foot of Daxing'an Mountains, Hulunbuir City, Inner Mongolia Autonomous region, the northern end of Hulunbuir grassland and the right bank of Erguna River. With geographical coordinates of 50 °01 / 53 °26'N and 119 °07 / 121 °49 East, it is the city with the highest latitude in Inner Mongolia Autonomous region and the northernmost border city in China. Erguna covers an area of 28400 square kilometers and has a total population of 79942 at the end of 2018. Erguna has been awarded as "the most folk cultural tourism destination in China", "National Leisure Agriculture and Rural Tourism demonstration County", "the Best Wetland with Chinese characteristics", "the most Chinese Ecological City", "National Scenic spot" and other honorary titles.
Airport In Erguna - Hulun Buir Hailar Airport
Hulunbuir Hailar Airport (Hulunbuir Hailar Airport, IATA: HLD, ICAO: ZBLA), often called "Hailar Airport", but its IATA filing name is "Dongshan", so it is also called "Hulunbuir Dongshan Airport"; located in Hulunbuir City, Inner Mongolia Autonomous Region, China Airport Street, Shengli Street, Hailar District, 3 kilometers away from the urban area of ​​Hailar District and the county town of Ewenki Autonomous Banner, is a 4D-level international feeder airport and a first-class air port open to the outside world   .
In 1932, Hailar Dongshan Airport opened to traffic; on December 28, 2007, the new runway of Hailar Dongshan Airport was opened; in August 2010, Hailar Dongshan Airport was renamed "Hulunbuir Hailar Airport"   ; On January 16, 2020, the indicator level of the flight area of ​​Hulunbuir Hailar Airport was changed to 4D   .
As of February 2021, the total area of ​​the Hulunbuir Hailar Airport terminal building is 28,127 square meters, divided into T1, T2 and international terminals; there are 14 C-class seats and 4 D-class seats on the civil aviation apron; the runway is 2,800 meters long , 45 meters wide; can meet the annual passenger throughput of 3 million person-times, 20,000 tons of cargo and mail throughput, and 30,000 aircraft take-offs and landings   .
In 2021, Hulunbuir Hailar Airport will complete a passenger throughput of 1,825,229 passengers, a year-on-year increase of 19.6%, ranking 65th in the country; a postal cargo throughput of 5,459.9 tons, a year-on-year increase of 3.9%, ranking 78th in the country; aircraft movements of 17,076, Year-on-year growth of 10.1%, ranking 95th in the country   .
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