and even their deputy commander was saying that their fifth gen may fly next year, anyways I honestly believe that Chinese would at least need 5 to 6 years more because still they are perfecting their 4th and 4.5th gen aircraft technologies. the critical part for 5th gen would be engine development. I think China would like to master WS-10 and WS-13 before moving to more sophisticated WS-15. But doing this would not be an easy task, look at Russians, they have good exprience in engine manufacturing and yet they are struggling with development of engine for PAK-FA. like i said before, PAF may not need 5th Gen fighter as it has enough Missile capability for deep strike in India, however, a capability to fire CM from subs will significantly augment deep strike capability. 5th Gen would simply cost too much. Buy some good subs with SLCM attack capability and this would be as deadly as a stealth fighter AC.