Well, recall how long it took from FC-31, through FC-31V2 to eventually the J-35 prototype. I recall back in 2012 or so one of the first artworks of FC-31 was carrier based. This is not to say that a similar time could or should ellapse until the J-50H prototype, that was a mistake as i pointed with other occasions, hopefully the great delay/diddle-dwaddle in the case of J-35 won't be repeated, but there might be a few years until a J-50H could fly. Ideally several prototypes or even LRIP should be timed with the commissioning of the 004 CVN.