Xining Caojiabao International Airport (IATA: XNN, ICAO: ZLXN), also called Caojiapu Airport, is an airport serving Xining, the capital of Qinghai Province, China. It is located in Huzhu County, Haidong, on the Tibetan Plateau about 30 kilometres (19 mi) east of downtown Xining. The airport began operation in 1991, and in October 2011 a new 3,800 meter long runway was built to replace the old one.
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