• San Francisco
  • Guanghan

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.

Guanghan, a county-level city under the jurisdiction of Sichuan Province, is hosted by Deyang City. Known as Hanzhou in ancient times, also known as Yancheng, it is the first pilot county (city) in Sichuan to expand its power. It is 18 kilometers north of Jingyang District of Deyang City and 24 kilometers south of Chengdu City. It is located at the western foot of Longquan Mountains in the northeast of Chengdu Plain. Guanghan belongs to the humid climate zone in the middle subtropical zone of Sichuan Basin; it has jurisdiction over 9 townships and 3 streets with a total area of 538 square kilometers and has a registered population of 604000 in 2017. Guanghan is located in the core area of the hinterland of "the land of abundance". Since ancient times, it has been said that "the gate of Yizhou, the main thoroughfare of Shu province and the way to Beijing" is the north gate of Chengdu. Sanxingdui site in Guanghan is an ancient Shu cultural site about 5000 to 3000 years ago, which is regarded as one of the greatest archaeological discoveries of mankind in the 20th century, indicating the Yangtze River valley and the Yellow River.
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