• Portland
  • Ludian County

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.

Ludian County is one of the counties under the jurisdiction of Zhaotong City, Yunnan Province, located in the northeast of Yunnan Province, the south of Zhaotong City, the north bank of Niulan River. The east-west horizontal distance of the county is 50 kilometers, the north-south vertical distance is 60 kilometers, and the total area is 1519 square kilometers, of which the mountain area accounts for 87.9 percent of the total area and the dam area accounts for 12.1 percent. As of 2013, Ludian County has jurisdiction over 10 towns, 2 townships (including 2 ethnic townships), a total of 4 neighborhood committees and 80 administrative villages. The county government is in Wenping town. The vertical climate change in Ludian County is obvious, with no extreme heat in summer and no severe cold in winter. The average annual temperature is 12.1 ℃, the annual frost-free period is 220 days, and the average annual precipitation is 900mm. There are silver, lead, copper, sulfur, coal, phosphorus and other mineral deposits, Lemachang silver mine in the territory. Ludian County is the main producing county of wax insects in China, and the main producing county of walnut and high quality flue-cured tobacco in Yunnan Province.
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