Thats the problem. Is China an enemy or just a country with an aggressive foreign policy? Don't forget that the Me109 prototype flew with a Kestrel engine and the MiG 15 was developed around the copy of the RR Nene which was provided to the USSR. Fast jet pilots have been going to Saudi Arabia for years even though there is a suggestion of official support for the September 11 operation. Personally I don't think it will make much difference because they will be trying to teach pilots indoctrinated in CCP culture to fly with a Western mindset. It could also be unofficially sanctioned as a way of getting intel on the PLAF way of doing business.