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  • Yi'an District

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.

Yi'an District, which belongs to Tongling City, Anhui Province, is located in the central and southern part of Anhui Province, on the south bank of the middle and lower reaches of the Yangtze River, close to the developed Yangtze River Delta, between longitude 117 °42 "- 118 °10" 6 "east longitude and latitude 30 °45 12"-31 °07 56 "north. Fanchang and Nanling to the east, Qingyang and Guichi to the south, and Zongyang and Wuwei to the northwest. It is only 152 kilometers away from the provincial capital Hefei. In 2017, Yi'an District has jurisdiction over 6 towns and 2 townships, with a total area of 845 square kilometers. In 2016, there were 290932 registered residents (255000 permanent residents). In 2016, the gross domestic product (GDP) of Yi'an District reached 13.593 billion yuan. Yi'an, who first appeared in the first year of Tang Wende (AD 888), is the development of Chinese bronze civilization.
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