Long live the laborer! Long live the proletariat! Happy Labour Day! J-jiao-1 (Chinese code name: JJ-1, English: Shenyang JJ-1) trainer, is a subsonic jet intermediate trainer developed by Shenyang Aircraft Factory of China in the 1950s.The aircraft is the first aircraft and the first jet aircraft designed and manufactured by the People's Republic of China [1-2], so it occupies an important position in the aviation history of new China.Only three j-Kyo-1 trainers were built for full static tests and test flights. Later, due to the adjustment of the pilot training system of the Chinese Air Force, the research and development was not continued, resulting in the suspension of the project.