Brother, RD93 smoke heavily. A fifth gen can't carry a smoky engine. I love PAF, the same level I love PLAAF. So sometimes I want to push PAF the same level I want to push PLAAF. China Pakistan Zindabad! When J20b carry WS15 flying in the sky, we will have a party! China is on the threshold to prosperity and rise again, so as Pakistan!
The main job China is doing now: seperate the development of Engine from fighter jet ! Design fighter jet based on Engine development, not the contra versa like used to be. A independent engine company had been established apart from AVIC. And now a dedicated engine R&D institution is setting up in Beijing, means the government want to supervise the engine development under its very own eye.