The Nanchang (now known as Hongdu Aviation) is given a mission, during the 1960s, to design a supersonic attacker, to face a more serious threat made by Soviet armored fleets. By purchasing a MiG-23 from Iraq, China had the capability to build a variable swept wing fighter/bomber.
The designer in chief is Lu Xiaopeng, who also designed the Q-5 Fantan attacker and act as a major ground attacker for China until replaced by JH-7 Feibao(Flanger) and J-16(Flanker-D).
However, due to the cultural revolution's aftermath and delayed progress for the WS-6 engine, Q-6 was terminated in 1980.

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The aircraft I built is made on a very limited amount of resources. There were only a few pictures found available due to both secrecy and an early termination. There were sources with additional stabilizing blades, one with a rotatable pylon and one with air brakes. Due to the reason, I will make the detailed version later.