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  • Changhai 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.

Changhai County, under the jurisdiction of Dalian City, Liaoning Province, is located in the Changshan Islands and belongs to the extension of Changbai Mountain Mountains. It belongs to the warm temperate semi-humid monsoon climate, with four distinct seasons, warm in winter and cool in summer, sufficient sunshine and small temperature difference; the total land area is 142.04 square kilometers, and it has jurisdiction over 5 towns; it has a registered population of 71226 in 2018. Changhai County is the only island county in Northeast China and the only island border county in the country. It is located in the northern part of the Yellow Sea to the east of the Liaodong Peninsula, opposite to the Korean Peninsula in the east, opposite to the Miaodao Islands in Shandong Province in the southwest, and adjacent to the urban areas of Dalian, Pulandian City and Zhuanghe City in the west and north. It is the nearest area to Japan and South Korea in the northeast. In November 2018, Changhai County was selected into the national "Happiness 100 Counties list". In 2018, Changhai County achieved a GDP of 9.45 billion.
Airport In Changhai County - Dalian Zhoushuizi International Airport
Dalian Zhoushuizi International Airport (Dalian Zhoushuizi International Airport, IATA: DLC, ICAO: ZYTL), located in Ganjingzi District, Dalian City, Liaoning Province, China, is a 4E-level civil transport airport. One of the important airports, it is a national first-class civil international airport, a major domestic trunk line airport and an international scheduled flight airport.    
Dalian Zhoushuizi International Airport was opened to traffic on October 6, 1972. In 1984, 1992, 1999 and 2005, the airport was expanded and upgraded successively.   On September 6, 2011, the third-phase terminal building of the airport was completed and put into use, and the annual passenger handling capacity of the airport rose to 16 million to 20 million passengers.  
According to the official website of Dalian Zhoushuizi International Airport in November 2017, the airport covers an area of ​​3.45 million square meters and has a 3300-meter-long runway; the area of ​​the apron is 660,000 square meters, and there are 42 parking spaces (including 18 corridor bridges); The total area of ​​the terminal building is 135,000 square meters; a total of 88 cities and 146 domestic and overseas routes have been opened.  
In 2016, the passenger throughput of Dalian Zhoushuizi International Airport was 15,258,200 passengers, a year-on-year increase of 7.8%, exceeding 15 million passengers for the first time.  
In 2017, the passenger throughput of Dalian Zhoushuizi International Airport was 17.5 million, a year-on-year increase of 14.7%, the largest increase since 2014. The cargo and mail throughput was 166,000 tons, a year-on-year increase of 12.1%; the number of takeoffs and landings was 141,000, a year-on-year increase of 10.7%; they ranked 23rd, 17th, and 21st in mainland China respectively.
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