China will probably come up with it's own stealth technology whether they have parts of the downed helicopter or not. I can tell you though, any such transfer would be met by immediate calls to cut off all funding of any projects in Pakistan in our Congress...and that is already happening. As angry as many Pakistanis may be at the US operation to kill bin Laden, Americans have been completely outraged that he was living in such comfort, in the heart of Pakistan, within walking distance of Pakistan military facilities and the homes of so many Pakistani officers. It is simply not believed here that high ranking officers of the Pakistan armed forces were unaware of bin Laden's presence there.