What kind of airbase is the airport that only China United Airlines uses commercially?
Beijing Nanyuan Airport: Beijing Nanyuan Airport (IATA: NAY, ICAO: ZBNY) is a military airbase that also serves as the secondary airport of Beijing. China United Airlines: China United Airlines Co., Ltd. () is a budget airline with its headquarters in Fengtai District, Beijing, China, operating scheduled flights and charter services in co-operation with local enterprises out of Beijing Nanyuan Airport, making it the only commercial airline using this airport.
military