• Portland
  • Tianshui,Tienshui

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.

Tianshui, a prefecture-level city under the jurisdiction of Gansu Province, is located in the southeast of Gansu Province, adjacent to Guanzhong Plain. It is an important node city of Guanzhong Plain Urban agglomeration and the sub-core city of Guanzhong-Tianshui Economic Zone. Tianshui, once known as Shangli, Chengji and Qinzhou, is said to be the birthplace of Fuxi and Nu WA, one of the important birthplaces of Chinese civilization, known as "the hometown of Emperor Xi". Tianshui has jurisdiction over 2 districts and 5 counties, with a total area of 14325 square kilometers and a total population of 3.829 million, including 3.3549 million permanent residents (2018). Tianshui is high in the northwest and low in the southeast, with an elevation of 1000-2100 meters above sea level. The climate is temperate monsoon climate. Tianshui is a famous historical and cultural city in China, an excellent tourist city in China, and one of China's old industrial bases. It has national and provincial enterprise technology centers and engineering.
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