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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.

Dongying District is a municipal district belonging to Dongying City, Shandong Province, located in the northeast of Shandong Province, is the central area of Dongying City, the hinterland of the Yellow River Delta. Dongying District is a group new urban area developed on the basis of oilfield mining area. The ground spans 118 °12 °42 "~ 118 °59 °52" east longitude and 37 °14 °13 "~ 37 °31" 57 "north latitude. It is bordered by the Bohai Sea to the east, the Yellow River to the west, Guangrao County and Boxing County to the south, and Kenli District to the north. It is mainly composed of Dongcheng and Xicheng. The built-up area of Dongcheng is 44 square kilometers and that of Xicheng is 66 square kilometers. Dongying District, with a population of 615600 (2012), has jurisdiction over 6 streets and 4 towns. In 2011, the gross domestic product of Dongying District reached 27%.
Airport In Dongying District - Dongying Shengli Airport
Dongying Shengli Airport (Dongying Shengli Airport, IATA: DOY, ICAO: ZSDY), located in Shangfei Avenue, Yongan Town, Kenli District, Dongying City, Shandong Province, China, is 12.5 kilometers away from Dongying Municipal People's Government and Laizhou Bay. It is a 4D-level domestic airport. Regional Airport, COMAC Dongying Civil Aircraft Test Flight Base   .
On November 28, 2001, Dongying Yongan Airport officially resumed flights; on January 15, 2011, Dongying Yongan Airport was renamed Dongying Shengli Airport   ; On February 1, 2018, the 3600-meter runway of Dongying Shengli Airport was opened   .
As of January 2022, the terminal building of Dongying Shengli Airport has an area of ​​25,400 square meters, with 4 boarding bridges; there are 7 aircraft seats on the civil aviation platform, including 6 class C seats and 1 class D seat ;The length of the runway is 3,600 meters and the width is 45 meters; it can meet the needs of annual passenger throughput of 1 million passengers and cargo throughput of 5,000 tons   [twenty one]    .
In 2021, Dongying Shengli Airport will handle a total of 682,129 passengers, a year-on-year increase of 49.8%, ranking 112th in the country; cargo and mail throughput will be 705.2 tons, a year-on-year increase of 8.7%, ranking 134th in the country; aircraft movements will be 31,569 , a year-on-year decrease of 21.15%, ranking 73rd in the country   .
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