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  • Xiayi

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.

Xiayi County, referred to as Li, known as Liyi in ancient times, is under the jurisdiction of Shangqiu City, Henan Province, known as "the land of Confucius in China". Located in the east of Henan Province, the joint of Henan, Shandong, Jiangsu and Anhui provinces, Yongcheng and Dangshan counties to the east, Yucheng County to the west, Qiaocheng District, Bozhou City, Anhui Province to the south, Shan County, Heze City, Shandong Province to the north, Longhai Railway and Lianghuo Expressway across Xiayi, it is the best investment city for the Central Plains to undertake the industrial transfer of the three major economic circles of "Yangtze River Delta", "Pearl River Delta" and "around Bohai Bay". As of September 2018, Xiayi County has jurisdiction over 24 townships and 731 administrative villages, with a total area of 1481 square kilometers and a total population of 1.2 million. Xiayi is the ancient capital of China, the ancestral land of China, and one of the birthplaces of Longshan culture. There were people here as early as the Neolithic Age more than 5000 years ago
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