• Portland
  • Naidong 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.

Naidong District (Tibetan: Tibetan dialect, Tibetan Pinyin: Ningdong Zong) belongs to Shannan City, Tibet Autonomous region, located in the south-central part of the Tibet Autonomous region, the south of the Gangdise Mountains, the middle reaches of the Yarlung Zangbo River, and is the seat of the people's Government of Shannan City. It means "before the tip of the elephant trunk mountain" in Tibetan. The geographical coordinates of Nidong District are located between 28 °44 °N and 29 °36 °N, 91 °32 °N and 92 °02'E, bordering Zhabang County in the west, Mozhu Gongka County in Lhasa City in the north, surrounded by Qiongjie, Longzi and Cuomei counties in the south, and Sangri and Qusong counties in the east, with a total area of 2208.85 square kilometers, with a total area of 94.4km from north to south and 31.2km from east to west in the middle, with a total population of 76976 (
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