unlikely, China doesn't need SU-35 ... unless a political move
If the news are true, you do not make sense, the Su-35s cost USD 85 million, dollars a piece, China can make the Su-27s domestically, for much cheaper price, so why China will buy a fighter for Charity? if it is true the reason is super cruising engines and very advanced E/R modules on the IRBIS.
The AESA radar on PAKFA has a lot of those technologies used on Irbis, albeit on an AESA radar.
Also the IRTS on SU-35 has a very long range of detection, these technologies are are useful even for PAKFA.
China is not buying the Su-35 out of charity, the Russians were afraid they might copy the technologies of Su-35.
That drag the negotiations, however from my point of view they decided the Chinese will take 5-15 years to copy the Al-41/117 engine and if the reports are true the latest engine Russia will fit to PAKFA has 17/18 tonnes of thrust.
with the Su-35, basically China will make utterly obsolete the Japanese F-15/F-2, the South Korean F-15Ks and all the major fighters in the Area, with the exception of the F-22.