• San Francisco
  • Guangzhou,Canton,Kwangchow

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.

Guangzhou, referred to as "Guangzhou", also known as Yangcheng and Huacheng, is the capital, vice-provincial city, national central city and mega city of Guangdong Province. It is an important central city, international trade center and comprehensive transportation hub in China as approved by the State Council. By 2018, there were 11 districts under the jurisdiction of the city, with a total area of 7434 square kilometers, a built area of 1249.11 square kilometers, a resident population of 14.9044 million, an urban population of 12.8744 million, and a urbanization rate of 86.38%. Located in southern China, bordering the South China Sea and the northern edge of the Pearl River Delta, Guangzhou is the headquarters of the theater headquarters in southern China, a national comprehensive gateway city, the first batch of coastal open cities, and the southern gate of China to the world. Guangdong-Hong Kong-Macau Greater Bay Area, the central city and area of the Pan-Pearl River Delta economic zone.
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