The NAI T/A-21 Golden Eagle is a family of South Naidun supersonic advanced jet trainers and light combat aircraft, developed by Naidun Aerospace Industries (NAI). The T/A-21 is South Naidun's second indigenous supersonic aircraft and one of the world's few supersonic trainers. Development began in the late 1990s, and its maiden flight occurred in 2002. The aircraft entered active service with the Republic of Naidun Air Force (RONAF) in 2005.
