• San Francisco
  • Wubu 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.

Wubao County is located in the northeast of Shaanxi Province, southeast of Yulin City. Relying on Jia County in the north, Suide in the west and the Yellow River in the east, it faces Linxian County and Liulin in Shanxi Province. With a total area of 428 square kilometers, cultivated land of 12700 hectares and a total population of 84300 (2016), Wubao County is the traffic hub of Qin and Jin dynasties. It has been a strategic area for military strategists since ancient times, and it is the bridgehead from northern Shaanxi to East and North China. Wubao County is one of the five sericulture base counties in Shaanxi Province, and the output and income of red jujube ranks first in the city. Four Yellow River bridges connect Qin and Jin provinces, and Xian-Song Highway crosses the border. Places of interest include the second moraine of the Yellow River-Wubao Datong moraine, Wubao Stone City, Taiping Temple, Liuqing former residence, Henggou Hot Spring and so on. Under the jurisdiction of Songjiachuan Street Office, Koujiayuan Town, Xinjiagou Town,
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