• San Francisco
  • Simao District

San Francisco (/ˌsæn frənˈsɪskoʊ/; Spanish for "Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California in the United States. The city proper is the fourth most populous in California and 17th most populous in the United States, with 815,201 residents as of 2021. It covers a land area of 46.9 square miles (121 square kilometers), at the end of the San Francisco Peninsula, making it the second most densely populated large U.S. city after New York City, and the fifth most densely populated U.S. county, behind only four of the five New York City boroughs. Among the 91 U.S. cities proper with over 250,000 residents, San Francisco was ranked first by per capita income (at $160,749) and sixth by aggregate income as of 2021. Colloquial nicknames for San Francisco include SF, San Fran, The City, Frisco, and Baghdad by the Bay.

San Francisco and the surrounding San Francisco Bay Area are a global center of economic activity and the arts and sciences, spurred by leading universities, high-tech, healthcare, FIRE, and professional services sectors. As of 2020, the metropolitan area, with 6.7 million residents, ranked 5th by GDP ($874 billion) and 2nd by GDP per capita ($131,082) across the OECD countries, ahead of global cities like Paris, London, and Singapore. San Francisco anchors the 13th most populous metropolitan statistical area in the United States with 4.6 million residents, and the fourth-largest by aggregate income and economic output, with a GDP of $669 billion in 2021. The wider San Jose–San Francisco–Oakland, CA Combined Statistical Area is the fifth most populous, with 9.5 million residents, and the third-largest by economic output, with a GDP of $1.25 trillion in 2021. In the same year, San Francisco proper had a GDP of $236.4 billion, and a GDP per capita of $289,990. San Francisco was ranked seventh in the world and third in the United States on the Global Financial Centres Index as of March 2022.

Simao District, which belongs to Pu'er City, Yunnan Province, is located in the south of Yunnan Province, the middle and south of Pu'er City, and the middle and lower reaches of the Lancang River, between 22 °27 degrees north latitude and 101 °27 degrees east longitude, Jiangcheng County to the east, Lancang County and Jinggu Dai Autonomous County to the west, Xishuangbanna Dai Autonomous Prefecture to the south and Ninger County to the north, covering a total area of 3928 square kilometers. Simao District is the starting point of the ancient Tea-Horse Road in history-the Southern Silk Road. It is one of the three major customs towns in Yunnan. It was once known as "Southeast Asian Land Wharf" and "Yinsimao". The main relics in Simao District are Shiping Guild Hall, Simao Wenmiao, Simao Old Customs, Tea Horse Road, etc.; historical figures include League member Lu Zhiyi, honest official Chen Qizhou, and so on. As of 2017, Simao District has jurisdiction over 3 townships and 4 towns
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