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  • Longting Area

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.

Longting District, one of the municipal districts of Kaifeng City, Henan Province, is located in the west of Kaifeng City, named for the famous site of the Imperial Palace in the Northern Song Dynasty. The area is bordered by Zhengzhou Kaifeng in the west, the Yellow River in the north, Xiangfu District, Shunhe District and Gulou District in the east, and Xiangfu District in the south. The area has a total area of 345 square kilometers and a total population of 360000 (2016). The district government is stationed at 16 Sports Road, Wu Chaomen Street. There are many lakes and ponds in Longting District, and there are Liuchi and Yellow River beaches outside the city. The north-south direction of the Huangbian River flows through the area to communicate with Longting Lake, which is the main channel for sewage discharge and waterlogging prevention; the north branch river in the city flows through the area, and Pan and Yang Lake in front of Longting have a long history. It is the 15th year of Chongzhen of the Ming Dynasty (1642), and the Yellow River gap is formed by filling the city with water. Longting District is a famous cultural tourism scenic spot in Kaifeng.
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