China doesnt need your engine tech.
AFAIK, Chinese engine tech far surpass its Turkish counterparts..... you can correct me on this one if Iam wrong though
Actually China seems to need any engine tech. They were very eager to buy Motor Sich, in spite of the dated tech they used.
There isn’t much known about their WS10 that powers the J20. But initial batches needed to go through engine changes after only 500hours’ flight. Later they reported that they went above 1000hours before engine change. But that is still far short of 8-9000 hours of flight achieved by western engines‘ performance of similar thrust level. (j10 manages 19000lbf dry and 30000lbf with A/B supposedly using single crystals at turbine section)
If they have improved further in the last few years, that is yet to come through the grapevine.