• Portland
  • Duolun

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.

Duolun County, which belongs to Xilingol League of Inner Mongolia Autonomous region, is located at the southern end of Xilingol League and the eastern end of the northern foot of Yinshan Mountain. Longitude 115 °30, longitude 116 °55, latitude 41 °45, longitude 42 °39'. It is connected with Zhenglan Banner in the west, Keshikten Banner in Chifeng City in the north, and Guyuan County, Fengning County and Weichang County in the south. The total area is 3863 square kilometers. In 2011, it was approved to build a central city by the government of Inner Mongolia Autonomous region and Xilingol League. County people's government in Duolun Nur town. It won the honorary title of famous historical and cultural town in China in 2008 and the honorary title of famous landscape tourism town with national characteristics in 2010. In September 2018, he won the title of "China Natural oxygen Bar". On April 18, 2019, the people's Government of Inner Mongolia Autonomous region decided Duolun County.
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