China United Airlines is a budget airline with its headquarters in Fengtai District Beijing,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.
China United Airlines was established in 1986 as an arm of the civil transport division of the People’s Liberation Army. In 2002, all scheduled services were ceased, followed by a full suspension of flight operations in 2003 due to a Chinese governmental regulation prohibiting the Army from being directly involved in commercial activities. In 2005, the Civil Aviation Administration of China approved the relaunch of the airline. Now with Shanghai Airlines holding 80 percent of the stake. Even though China United Airlines has since then lost its military status, it is still allowed to use military airports, in contrast to other Chinese airlines.
Source: Wikipedia January 2019