J-20 No.2015 is very close to final Production version. J-20 doesnt use Russian 99M2 as most foreign 'experts' and Russia media claimed it uses improved third gen turbofan, domestic engine. J-20 No. 2015 J-20 production phase A wont have WS-15 but domestic improved third gen turbofan, Max 14.3 metric tons thrusts production phase B will be fit with WS-15. J-20 deployment version will have soft laser weapon , not to shoot down a plane or kill a ground target, but to 'kill' infrared guided missiles.