they could also use ultra high end T1100 composite material in J-50.. couple of local firms have started production. next gen Electronics and avionics too near completion.They could do that by leveraging existing tech as much as possible. Initial version could be built around WS-15 TVC engines, GaN or GaNS AESA radar based on that on J-35 or J-20A/S but with more TRMs, same as the EOTS, avionics, PL-16 AAMs etc. Of course they'll try to implement as much 6th gen tech as is available such as AI for CCA capability and other features.
SAC new super production facility have integrated composite and titanium production facilities too. in-short everything has been set. its all depend on testing and evaluation of J-50.
China basically rewriting the rules of fighter jet development.