• San Francisco
  • Runan 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.

Runan County, which belongs to Zhumadian City, Henan Province, faces Pingyu County in the east, Shangcai County in the north, Zhengyang County in the south and Linyi City in the west. It is between 114o 21km east longitude, 114o 53m east longitude and 33o 00km north latitude, with a total area of 1475 square kilometers. Runan is located in the Huaibei Plain with a history of nearly 2000 years. Han Gaozu bought Runan County, which was already a land and water wharf connecting the north and south of the Central Plains. There are more than 280 cultural sites in China, which have been approved as open counties by the State Council of China and designated as famous historical and cultural cities by the Henan provincial government. As of 2018, Runan County has jurisdiction over 4 streets, 12 towns and 2 townships. By the end of 2017, Runan County had a resident population of 658000, with a GDP of 19.61 billion yuan, of which
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