• San Francisco
  • Tsingyün、Qingyuan

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.

Qingyuan, also known as "Fengcheng", is a prefecture-level city in Guangdong Province, located in the middle and upper reaches of the Beijiang River. As early as the Neolithic Age, ancestors thrived in this land and created a splendid prehistoric civilization. Qingyuan is located in the north-central part of Guangdong Province, bordering Shaoguan in the northeast, Zhaoqing in the southwest and Guangzhou and Foshan in the southeast. With a total area of 19200 square kilometers, it is the largest prefecture-level city in Guangdong Province, with jurisdiction over Qingcheng, Qingxin District 2 and Fogang, Yangshan, Liannan and Lianshan counties and two county-level cities in Yingde and Lianzhou, with a total registered population of about 4.1 million in 2018. Qingyuan is connected with the Pearl River Delta region with Guangzhou as the center. In history, the southern part of Qingyuan once belonged to the jurisdiction of Guangzhou for a long time. Qingyuan culture, like Guangfu cultural circle, has a deep relationship in history, geography and ethnic groups. Yes
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