Before that fateful dogfight. The SU-30MKI was the darling of the IAF. Many things were boasted about it including its Bars radar, R77 missile, and most famously for "tracking" a J-20 at over 100km away (yeah right).
Nothing to really brag about when China has in its possession everything that makes the MKI a strong aircraft, except better i.e. Su-35S.
Irbis-E is a modernized derivative of the Bars radar while the R-77 (original designated RVV-AE) is nothing spectacular either. It got outranged by AIM-120Cs during Swift Retort, which is presumably why they wasted no time in buying the extended-range R-77-1 from Russia almost immediately after the engagement (which btw they also stated that they would be replacing R-77s with Israeli missiles, didn't work out I guess). And IIRC the R-77s that were acquired along with Su-35S for the PLAAF were also the improved '-1' variant
That is to say, whatever tricks the MKI has up its sleeve, China is already both aware of it and, almost certainly, very much prepared for it. Possibly even overestimating it too since I assume the Su-35S is used as simulated MKI in training, with the performance specs assumed to be the same as MKI even if it is more capable in most ways, and at least equal in others. Highly doubt whatever French/Israeli avionics and jammers they jury rig into it would give it a decisive edge, just like how they didn't give the Bison a decisive edge. They definitely posed a serious threat in 2004, but I doubt they've been a giant source of worry since 2013 at latest.
So Rafale is now their new mystical and legendary silver bullet against the PLAAF (other than the omni-purpose BrahMos ofc), and when the day comes where it's Rafale's turn to get shot out the sky, they would have already moved on to the Su-57E or something.