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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.

Luan Chuan got its name from the legend that a flock of birds lived here in ancient times. Located in the west of Henan Province, adjacent to Songxian County in the east, Lushi in the west, Xixia in the south and Luoning in the north, it is known as "the back Garden of Luoyang" and "the South Gate of Luoyang". Luanchuan County, with a total area of 2477 square kilometers, is known as "four rivers, three mountains and two rivers, nine mountains and half water and half divided fields". It now has jurisdiction over 12 towns and 2 townships with a management committee (Chongdugou Management Committee) and 213 administrative villages (neighborhood committees), with a total population of 350000, including an agricultural population of 299000. The built-up area of the county seat in 2016 is 15.78 square kilometers. Luanchuan County has successively won the National Health County, the strong Tourism County in China, the National Ecological County, the National Garden County, the National Leisure Agriculture and Rural Tourism demonstration County, the National Top Ten charming New Countryside, and the National Top Ten counties.
Airport In Luan - Luoyang Beijiao Airport
Luoyang Beijiao Airport (Luoyang Beijiao Airport, IATA: LYA, ICAO: ZHLY), located in Mangshan, at the junction of the old city and Mengjin District, Luoyang City, Henan Province, China, 11 kilometers southeast from the center of Luoyang, is a 4D-level international feeder airport , a national first-class air port open to the outside world, and the training airport of Luoyang Branch of Civil Aviation Flight Academy of China   .
On November 19, 1985, the construction of Luoyang Beijiao Airport started   ; On September 26, 1987, Luoyang Beijiao Airport officially opened to traffic   ; On August 1, 1992, Luoyang Beijiao Airport was approved by the State Council to open to the outside world   ; On April 9, 2010, the new terminal of Luoyang Beijiao Airport opened   .
According to the information on the airport's official website in June 2021, the terminal area of ​​Luoyang Beijiao Airport is 14,800 square meters, with 3 boarding bridges; the civil aviation station has 9 seats, including 8 D-class seats and 1 C-class seat. Class aircraft seats; the runway is 2,500 meters long and 45 meters wide; it can meet the needs of annual passenger throughput of 1.53 million passengers and cargo and mail throughput of 5,000 tons     .
In 2021, Luoyang Beijiao Airport will handle a total of 1,237,795 passengers, a year-on-year increase of 29.0%, ranking 87th in the country; cargo and mail throughput will be 928.9 tons, a year-on-year increase of 32.2%, ranking 124th in the country; aircraft movements will be 226,214 Flights, a year-on-year increase of 25.5%, ranking 11th in the country   .
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