• San Francisco
  • Doumen District

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.

Doumen District is under the jurisdiction of Zhuhai City, Guangdong Province. it is located at the southwest end of the Pearl River Delta, west of Zhuhai, connecting Zhongshan City to the east and Jiangmen City to the north, and connecting with the waters of Macao, between longitude 113 °0.5 'east and latitude 21 °59' and latitude 22 °25 'north, that is, between Modaomen and Yamen, the boundary between Chibi Island and Baijiao Qiwei is the widest 33.4 km from east to west. Doumen in July 1965 by Zhongshan, Xinhui designated some towns and villages to build a county, July 1983 under the jurisdiction of Zhuhai, in April 2001 to withdraw the county to establish a district. Doumen District ranked 22nd among the top 100 regions in China in 2018.
Airport In Doumen District - Zhuhai Jinwan Airport
Zhuhai Jinwan Airport (IATA: ZUH, ICAO: ZGSD), located at the southwest end of Sanzao Town, Jinwan District, Zhuhai City, Guangdong Province, China, is one of the five airports in the Pearl River Delta region.  
Zhuhai Jinwan Airport was officially completed in June 1995 and named "Zhuhai Sanzao Airport"; it was officially renamed "Zhuhai Jinwan Airport" on January 10, 2013.
According to the official website of Zhuhai Jinwan Airport in July 2018, Zhuhai Jinwan Airport has a 4,000-meter runway and a taxiway, which can meet the take-off and landing of large passenger and cargo aircraft such as B747-400; There are 17 (corridor bridge positions) and 6 remote aircraft positions; the area of ​​the terminal building is 91,600 square meters.  
In 2020, the passenger throughput of Zhuhai Airport reached 7.336 million passengers, a year-on-year decrease of 40.3%, ranking 38th in the country; the cargo and mail throughput was 38,000 tons, a year-on-year decrease of 24.8%, ranking 45th in the country; transport movements were 66,000, A year-on-year decrease of 25.3%, ranking 45th in the country. [twenty four] 
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