• San Francisco
  • Haiyuan 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.

Haiyuan County, which belongs to Zhongwei City, Ningxia Hui Autonomous region, is located in the central and southern part of Ningxia Hui Autonomous region. It is located in the arid zone of central Ningxia, between 105 °09 east longitude 106 °10 'and 36 °06 north latitude 37 °04'. It is connected with Yuanzhou District of Guyuan City in the east, Xiji County in the south, Jingyuan County and Huining County in Gansu Province in the west, Shapotou District and Tongxin County in Zhongwei City to the north. It is 95 kilometers from north to south and 80 kilometers from east to west, with a total area of 6899 square kilometers. The total population is 456600 (household registration in 2016), and the government is stationed in Haicheng town. Haiyuan County is a large agricultural population county integrating arid mountainous areas, old revolutionary base areas and Hui inhabited areas, and it is also a key county in the national poverty alleviation work. In 2016, Haiyuan County achieved a GDP of 4.893 billion yuan. 2008
Travel Notes In Haiyuan County
The Long March of Three Generations——Take the Long March Again
The Long March of Three Generations From July 27th to August 25th, 2020, my daughter, old father, and nephew and I set off from Shenzhen. It took 30