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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.

Aohan Banner, Chifeng City, resident Xinhui Town, is located at the northern foot of Nulur Hushan vein, the southern edge of Horqin Sandy Land, Naiman Banner of Tongliao City in the east, Jianping County of Chaoyang City in the west, Beipiao City and Chaoyang County in the south, and Wengniute Banner in Chifeng City in the north. Aohan, originally the name of the Mongolian tribe, was translated as "Boss" in Mongolian. Aohan is a famous cultural relic county in China. More than 4000 ancient sites of different periods are distributed on an area of 8300 square kilometers. Among them, four kinds of prehistoric cultures such as Xiaohexi culture, Xinglongwa culture, Zhaobaogou culture and Xiaoheyan culture were found and named in Aohan. Aohan is also a famous agricultural county. In Gulubanhao Township, there is Hongshan Reservoir, the largest reservoir in Northeast China, which is the most important water conservancy project in the West Liao River Basin. The aquatic products produced by Hongshan Reservoir are sold to the north.
Airport In Aohan - Chifeng Yulong Airport
Chifeng Yulong Airport (Chifeng Yulong Airport, IATA: CIF, ICAO: ZBCF), located in Tuchengzi Village, Niujiayingzi Town, Karaqin Banner, Chifeng City, Inner Mongolia Autonomous Region, China, about 15 kilometers northeast from the center of Chifeng, is a 4C-level military and civilian Shared use of domestic regional airports   .
On September 20, 1958, Chifeng Xijiao Airport officially opened to traffic   ; On August 25, 2006, the Chifeng Yulong Airport project started construction; on March 20, 2008, Chifeng Yulong Airport was opened, and Chifeng Xijiao Airport was permanently closed; in 2016, Chifeng Yulong Airport's station floor reconstruction and expansion project was opened   .
As of August 2022, the T2 terminal of Chifeng Yulong Airport has an area of ​​31,534.89 square meters, with 9 boarding bridges; 1 Class B seat, 16 Class C seats and 1 isolation stand on the civil aviation platform ; The runway is 2,800 meters long and 50 meters wide, which can meet the annual passenger throughput of 2.78 million passengers.      .
In 2021, Chifeng Yulong Airport will handle 1,421,971 passengers, a year-on-year increase of 10.2%, ranking 77th in the country; cargo and mail throughput will be 1,184.7 tons, a year-on-year decrease of 47.5%, ranking 115th in the country; aircraft take-offs and landings will be 13,727, a year-on-year increase 7.8%, ranking 112th in the country [twenty three]  .
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