January 2011 UTC actually china has cleared production for jet engine for twin configuration for some year the J 10 problem is distinctly one found in single engine design from what we know the J 20 already has engine installed and can move on it s own power in taxi all they have to do is to uprate it it not like this plane is going into production next year they got time ain t we running ahead of ourselves assuming that if we see a prototype it must mean production must be near 218 186 8 234 04 17 5