• Portland
  • Ya'an

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.

Ya'an, a prefecture-level city of Sichuan Province, is located at the western edge of Sichuan Basin and the eastern foot of Qionglai Mountain, with Chengdu, Ganzi to the east, Liangshan to the south and Aba to the north, 120km away from Chengdu; it belongs to the mountainous area on the western edge of Sichuan Basin, spanning the Sichuan Basin and the Qinghai-Tibet Plateau; the climate type is subtropical monsoon humid climate; the total area of the city is 15046 square kilometers, under the jurisdiction of 2 districts and 6 counties; the total population in 2017 is 1.5378 million. Ya'an is located at the intersection of Sichuan-Tibet and Sichuan-Yunnan Highway, 120 kilometers away from Chengdu. It is the transition zone between Sichuan Basin and Qinghai-Tibet Plateau, the transition zone between Han culture and national culture, and the transition zone between modern central city and primitive natural ecological area. it was the gateway and necessary road of the ancient southern Silk Road and was once the capital of Xikang Province. It is the history and culture of Sichuan Province.
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