• San Francisco
  • Huangling County

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.

Huangling County, the site of the Yellow Emperor Mausoleum of Xuanyuan, the first ancestor of the Chinese nation, belongs to Yan'an City, Shaanxi Province. It is located in the middle of Shaanxi Province, south of Yan'an City, 124 kilometers north of Yan'an, and 165 kilometers south of Xi'an, the ancient capital. The total area is 2292 square kilometers. Huangling is rich in human resources. The mausoleum of the Yellow Emperor Xuanyuan, the first ancestor of the Chinese nation, is located at the top of Qiaoshan, 1 km north of the county seat. It is the first batch of national key cultural relic protection units announced by the State Council. It has the reputation of "the first tomb in the world". Huangling County is named as "the hometown of the sacrificial culture of the Yellow Emperor of China" and the first batch of strong tourist counties in Shaanxi Province. In 2018, Huangling County had jurisdiction over one street and five towns, with a resident population of 131900, achieving a regional gross domestic product (GDP) of 15.241 billion yuan, of which the primary industry increased.
Travel Notes In Huangling County