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Portland (/ˈpɔːrtlənd/, PORT-lənd) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populous county in Oregon. As of 2020, Portland had a population of 652,503, making it the 26th-most populated city in the United States, the sixth-most populous on the West Coast, and the second-most populous in the Pacific Northwest, after Seattle. Approximately 2.5 million people live in the Portland metropolitan statistical area (MSA), making it the 25th most populous in the United States. About half of Oregon's population resides within the Portland metropolitan area.

Named after Portland, Maine, the Oregon settlement began to be populated in the 1840s, near the end of the Oregon Trail. Its water access provided convenient transportation of goods, and the timber industry was a major force in the city's early economy. At the turn of the 20th century, the city had a reputation as one of the most dangerous port cities in the world, a hub for organized crime and racketeering. After the city's economy experienced an industrial boom during World War II, its hard-edged reputation began to dissipate. Beginning in the 1960s, Portland became noted for its growing liberal and progressive political values, earning it a reputation as a bastion of counter-culture.

Nianzishan District, Qiqihar City, Heilongjiang Province is a municipal district, located in the eastern foot of Daxing'an Mountains, located in the westernmost part of Qiqihar, about 90 kilometers away from the central city, 113 kilometers away from the railway. It is adjacent to Longjiang County in the east, south and west, Gannan County in the northeast and Zhalantun City in Inner Mongolia in the northwest. The geographical coordinates are 47 °29 "N" 47 °41 "N, 122 °53" E and 123 °05'E. The area is long from north to south, narrow from east to west, and the center is slightly prominent, which is an irregular diamond shape. As of 2013, the total area is 357 square kilometers, the cultivated land area is 170000 mu, and the urban area is 9 square kilometers. As of 2013, the total population is 81000, of which the urban population is 56000, under the jurisdiction of 4 subdistrict offices and 9 administrative villages. two
Airport In Nianzishan District - Qiqihar Sanjiazi Airport
Qiqihar Sanjiazi Airport (Qiqihar Sanjiazi Airport, IATA: NDG, ICAO: ZYQQ), located on Damintun Airport Road, Longsha District, Qiqihar City, Heilongjiang Province, China, 10.5 kilometers north of Qiqihar City Center, is a 4C-level military-civilian joint feeder airport, Temporary air ports open to the outside world   .
On May 16, 1988, Qiqihar Sanjiazi Airport officially opened for civil aviation business   ; In June 1993, Qiqihar Sanjiazi Airport became a temporary port airport   ; In 2012, Qiqihar Sanjiazi Airport terminal corridor bridge opened   ; On June 26, 2022, the west runway of Qiqihar Sanjiazi Airport will be opened [twenty three]  .
According to comprehensive news in May 2020, the terminal area of ​​Qiqihar Sanjiazi Airport is 8,000 square meters, including 4,000 square meters for the International Joint Inspection Office.   , two of which are close to the plane; the east runway is 2,600 meters long and 45 meters wide, and the west runway (military) is 3,000 meters long and 50 meters wide; it can meet the annual passenger throughput of 600,000 passengers.     .
In 2021, Qiqihar's three sub-airports will handle a total of 390,683 passengers, a year-on-year increase of 5.4%, ranking 147th in the country; cargo and mail throughput will be 701.8 tons, a year-on-year increase of 85.2%, ranking 135th in the country; aircraft take-offs and landings will be 3,692, A year-on-year decrease of 5.2%, ranking 181st in the country   .
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