doesn't make sense and not true. in fact PLAAF moving from Russian engines. older PLAAF aircrafts will switch to WS-10 once Russian engine died out. many old J-11/J-10A have already switched to WS-10.
J-20 powered by AL-31F engines are less than 50.
it will be nightmare logistically for PLAAF if they start using newer hybrid Russian engine.
one more point, J-35A now finalized for PLAAF. it means older J-10/J-11 will be replaced.. no need for new engines or even WS-10..
Future PLAAF fleet - J-20/J-35/J-16 and J-10C. all these aircrafts already have domestic powerplants..
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i m being honest here, the chapter has been closed. though nobody knows what tomorrow will bring but the current sentiments in PLAAF is, to rely on domestic engines now.