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  • Songpan County

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.

Songpan County is a county under the jurisdiction of Aba Tibetan and Qiang Autonomous Prefecture in Sichuan Province. Located on the eastern edge of the Qinghai-Tibet Plateau, northeast of Aba Tibetan and Qiang Autonomous Prefecture, with an administrative area of 8486 square kilometers and a population of 74945 (2015), it has jurisdiction over 3 towns and 22 townships, and the county people's government is stationed in Jin'an Town. Songpan County has a long history. During the Hongwu period of the Ming Dynasty, Songpan got its name by setting up "Songzhou Wei", "Pan Zhou Wei" and "Song Pan Wei" successively. In 1913, the Songpan Zhili Hall was changed to Songpan County, and the county-level construction has been used ever since. Songpan County has developed traffic, and the western line of the "Nine Ring Road" runs through the whole county along the Minjiang River. Jiuzhai Huanglong Airport is only 25 kilometers south from the county seat. The natural landscape is complex and diverse, complete in categories and numerous in quantity. Has Huanglong, Munigou, Songpan ancient city and other scenic spots. 2016, Song
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