The East Pagoda Airport (东塔机场) in Dadong District is the oldest airport in Shenyang, opened in 1920s and retired in the 1980s,[102][103] though there has been proposals in 2013 to relocate and reopen it in Xinmin. The Beiling Airport (北陵机场) in Huanggu District is used by Shenyang Aircraft Corporation for test flights. The Yuhong Airport (于洪机场) in Yuhong District is commissioned for military use only by the local Northern Theater Command garrisons.[104]