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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.

Luonan County, located in the southeast of Shaanxi Province, belongs to Shangluo City. Located in the south of Huashan, Huayang Pool is set up in Zhou and Huayang County is located in Qin Dynasty. It is 108 kilometers away from Xi'an. It is adjacent to Lushi and Lingbao in Henan to the east, Danfeng and Shangzhou to the south, Huazhou and Lantian to the west, Huayin and Tongguan to the north, and is known as Shaanxi's "southeast gateway". It is the only Yellow River valley county in Shangluo City and the "top ten gold medal walnut counties" in China. The forest coverage rate is above 90%. Luonan is the hometown of Chinese character culture, and the word Shengcangjie created the characters here, so Luonan is one of the birthplaces of Chinese civilization. On August 4, 2018, the Fifth Plenary session of the fourth Shangluo Municipal Committee of the Communist Party of China discussed and deliberated the opinions on abolishing the establishment of Huayang District in Luonan County. This work is being submitted to the State Council for approval in accordance with the procedures, which means that Luonan County will withdraw in the future.
Travel Guides In Luonan County
Travel Notes In Luonan County