Why china need JF17 ? jf17 is like f5 or f20. Plaaf don't need it, becz they rarely fly their jets, j10 is a junk, jf17 need new infra hence expensive, no external threat, only thing good is su 27, su30 and copycat j11, there is no role for jf17 in plaaf. Also chinese not interested in new low quality engine, so they skipped jf17 and started stealing, buying tech to build and experiment and given top importance to economy. Russian case also similar, no money to buy new, and modified existing ones and given more importance to nuclear and high end weapons. Now situation changed, Plaaf focusing on j10s, j11/15/16 s, j20s, vintage and old ones like j7 for mongolia like countries. j10..,j11/15/16...,j20.. using similar engines. Now question is how many j31 jets were brought by plaaf ?