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  • Tibetan Autonomous Prefecture of Golog

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.

Guoluo Tibetan Autonomous Prefecture is an autonomous prefecture under the jurisdiction of Qinghai Province. it is located in the southeast of Qinghai Province in China, facing Gannan Prefecture and Huangnan Prefecture to the east, Aba Autonomous Prefecture and Ganzi Prefecture to the south, Yushu Prefecture to the west and Haixi Prefecture and Hainan Prefecture to the north; all are above 4200 meters above sea level, with a continental climate of the plateau. The state has a total area of 76400 square kilometers and has jurisdiction over six counties with a total population of 205700 in 2017. There are Animaqing Peak and Nianbaoyu Peak in Guoluo Tibetan Autonomous Prefecture; Zaling Lake and Eling Lake, which are called Baihai Shenhu Lake in ancient times, and the historical story of Tibetan-Han marriage; there are famous temples, ancient temples and cultural landscapes such as Laga, Baiyu, Chalang and so on. Because of its special geographical location and natural environment, the whole territory of Autonomous Prefecture is listed in the ── "Sanjiangyuan" Nature Reserve, the largest nature reserve in the country. two hundred and one
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