• San Francisco
  • Hualong 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.

Hualong District is the municipal district of Puyang City, which is located in the northeast of Henan Province and at the junction of Hebei, Shandong and Henan provinces. it was established in 1986, with a total area of 119square kilometers and cultivated land of 7360 hectares. In 2008, the total population was 349700, of which the agricultural population was 73000. In 2012, the GDP of Hualong District reached 7.083 billion yuan, the total retail sales of consumer goods reached 5.419 billion yuan, and the total investment in fixed assets of the whole society reached 9.84 billion yuan. Hualong District, the only administrative district under the jurisdiction of Puyang City, is the political, economic and cultural center of Puyang City and the headquarters of Zhongyuan Oilfield. Hualong District has been named as "National Advanced Zone for Scientific and technological Progress", "National Experimental Zone for Sustainable Development", "National Community Health Service demonstration area" and "National Social Security Ensemble".
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