AG2-Drop fuel tanks

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Chengdu J-9 was a designation assigned to a Chinese interceptor aircraft that never progressed beyond initial studies. The J-9 project was abandoned in favour of the Shenyang J-8, which was a safer technological bet for the limited Chinese aviation industry of the 1960s and 1970s.
At the beginning of the 1970s, the 611 Institute proposed a new design using a canard ahead of the delta wing (similar to the Swedish Viggen), but because it required new materials (plus having engine performance problems), it was not until 1975 that the design could be completed.
The program was also severely disrupted by the Cultural Revolution. The constantly shifting and unrealistic speed and altitude targets placed by the People's Liberation Army Airforce (PLAAF) frustrated the efforts of the J-9 design team.