Well, sorry for being so late to the party but the last four weeks have been more than heavy! Anyway, - and just as a pretext: I do not want to negate the result nor the J-10C's capabilities - but the problem is - no matter how official the message is - that all these statements from exercises, "Player A won X : 0 against B" are for the bin and sounds like an laymen‘ quartet play!
As long as we don't know the exercise scenario (Blue vs Red Force), the rules of engagements, the armament, accompanying types, etc., these statements are all simply worthless and without the possibility of verification you can tell everything.
As such even if as much as I understand these post - in fact even more astonishing since China is usually not bragging with such results - the point no-one with at least a bit of understanding can deny - as long as the points I raised are not known, it is almost worthless!
I had a most interesting chat with an Eurofighter-pilot from the German Luftwaffe, who participated an exercise with the IAF years ago and yes for sure, they had as expected "issues", but the point is, the rules of engagements, the number of aircraft participating, the weaponry, additional assets and even more so the airspace restricted for the exercise have been that limiting, so that the Typhoon has in fact almost no chance at all.
My point is, exercises are following an in advance pre-scripted environment and under strict terms of conditions, so that any generalising conclusions in the meaning Type A is better than Type B or AF 1 is better than AF 2 - and that's what the uninformed mass always does! - are simply useless!
Again, I do not want to deny these result and that does not mean I negate the J-10's qualities or the pilots performances, but the point is, they were favourable as a snapshot taken under the conditions just mentioned—conditions which, however, generally remain unknown to us. To truly be able to draw conclusions regarding which aircraft, armament, or air force—and whose tactics—are superior, one would simply have to give the participants free rein in their composition; yet this does not happen, and the parameters within which this limited picture was captured remain unknown to us.
Ergo... it is pointless!