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WikiPedia: Ruili Airlines http://news.carnoc.com/list/438/438875.html http://centreforaviation.com/profiles/airlines/rui... http://www.ch-aviation.com/portal/airline/RUI http://news.ifeng.com/a/20180309/56606248_0.shtml http://worldairlinenews.com/2014/02/04/ruili-airli... http://www.faa.gov/documentLibrary/media/Order/734... http://www.rlair.net/