When the United States refused to sell F-20 and F-16 aircraft to the ROCAF they decided they would produce their own. The AIDC (Aerospace Industrial Development Corporation) F-CK-1 is an air superiority jet fighter capable of multi-role tasks. The aircraft was named Ching-Kuo after the late President Chiang Ching-Kuo but commonly referred to as the IDF (Indigenous Defence Fighter). The first flight of the FSD (Full Scale Development) was on May 28, 1989 and entered service in 1994. The 131st and last F-CK-1 was manufactured in 1999.