I swear that China will tick out the engine problem in the near future. No matter how much money spent and how many people sacrifice. China had enhanced its emphasis on jet engine into strategic level! If WS15 with 18 tons plus wet thrust could be put into operation in 2019, China will be a leading country in engine technology. We have timeline, we never slack loose ourself. We know the responsibly on our shoulder!
PAF's target is to be the first user of 5th gen fighter in the sub continent. China has been the first one in Asia inducting 5th gen fighter, I hope Pakistan will catch up.