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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.

Lhasa, referred to as "La" for short, is the capital of China's Tibet Autonomous region, an international tourist city with plateau and ethnic characteristics, the political, economic, cultural, scientific and educational center of Tibet, and the holy place of Tibetan Buddhism. Located in the middle of the Tibetan Plateau, north of the Himalayas, 3650 meters above sea level (to prevent endogenous oxygen deficiency), is located in the valley plain of the middle reaches of the Lhasa River, a tributary of the Yarlung Zangbo River, which flows through it and flows into the Yarlung Zangbo River in the southern suburbs. Lhasa has sunny weather all year round, with little rainfall, no severe cold in winter, no heat in summer and pleasant climate. The sunshine time of the whole year is more than 3000 hours, which is known as "Sunshine City". Lhasa is rich in all kinds of resources, which has obvious resource advantages compared with other prefectures and cities in the country and the autonomous region. As the first batch of famous historical and cultural cities in China, La
Travel Sights In Lasa、Lhasa
Travel Notes In Lasa、Lhasa
Back to Lhasa, never tired of seeing the scenery again and again
I came to Lhasa six years ago during my graduation trip, and I only used it as a transit point to go to Nepal. Lhasa at that time gave me a lot of sho
Living in Lhasa, people who live in the snow-covered plateau are so happy
【Lhasa】Drunk Sunshine City "I fantasized since I was very youngjust fantasize about going to a faraway placeToday I walk in Lhasa, the heavenly LhasaT
The secret Lhasa, magnificent scenery, driving the North Ring Road, feeling the rich landforms and humanities of the Qinghai-Tibet Plateau
How far is it from Lhasa? Fly in the clouds for 6 hours. About Lhasa, I always have too many things to say. This city of sunlight contains too much of
The sky within reach, bright and colorful Tibet (Lhasa + Yamdrok + Linzhi)
Tibet has been in my mind for a long time. . . . . . I have been just thinking about it, and every time I plan to take action, I always make excuses,