[11B3]

Which is why we don't export what we fly ourselves. At least not with the full avionics suite. That way, when the Chinese get something of ours from a 'friend', it isn't even the top of the line. (Although it would be in China.)

[Aaron_A]

The Pakis received 30-40 F-16s in the 1980s.

The Su-27 per say isn't very modern. Same generation as the F-15 and the base models that the PRC has right now are pure air defense fighters. I'm not sure whether the upcoming Chinese purchase of the Su-30 variant includes TVC engines...I doubt it since the Russians haven't quite mastered them yet.