I agree. Though we probably should have at least heard a little something about the CAC bid for the PLAAF "light/medium" 5th generation fighter by now (even just Internet chatter).
The PLAAF light/medium 5th generation fighter is once again the J-31. Developing a stealth fighter costs billions of dollars and hundreds of engineers and technicians have to worked on it. Do you think that either SAC or CAC have that kind of resources just laying around ? I think that CAC will be focussed to get the J-20 right and the SAC will be focussed to getting the J-31 right. On top of that they both have other obligations like the J-10, J-10B and the JF-17 for the CAC and J-11B, J-15 and J-16 for the SAC and both of them also have varius drone projects in the works as well.
So i'm skeptical that China is building a third stealth fighter in Xi'an. Their days of building JH-7's are over as that plane will be replaced with the much more capable J-16. From now on Xi'an's main focus will, be getting the Y-20 plane right. And i'm skeptikal about other rumored projects like a single engine J-20, twin engined semi stealth J-10C or a navalized J-10 and the J-18 "Red Eagle" whatever that plane is suppose to be. If all these planes would to be developed it will costs tens of billions of dollars and requires thousands of engineers and technicians to work on these projects. Does China have that kind of resources to spare in its aerospace industry on top of the commitments mentioned above ? And why would they expense those resources on planes they don't need ? The hi lo mix of J-11 and J-10 and now their upgraded variants will do fine for China untill their stealth fighters comes in to play. So they don't need all those other planes that are mentioned on the internet.
I believe that we won't be seeing any more new (fixed wing) planes coming out of China for many years to come. Except in the field of helicopters which is a area in China's aerospace industry that's still somewhat underdeveloped compared to the rest. In the next few years we might see and upgraded and perhabs modified JF-17, but that plane is primarily for the benefit of Pakistan and the export markets. And expect new drones projects too. But i don't think that their will be too many fixed wing projects in the years to come as China already has a hand full on their existing projects.
Come to think of it can the SAC spend that much resources on the J-31 project without official censure ?
As for the export markets, i think only the J-31 will be offered to foreign customers and not the J-20 like in the US that only offers F-35 and not F-22 for export. And if a few customers wants ToT on the J-31 then they will have to pay for it.