For fuck's sake
The idiots in the Pentagon think this will hold them back, but it will only speed their development and make them more independent in their capabilities, while damaging US companies both today and in the future as China is able to better compete with them.
Anyway, China is hardly the military threat the USSR was back in the day (and the threat they posed to the US and western Europe was way overblown by the fear mongers trying to boost defense spending) China doesn't have a history of invading other countries, unlike the US. If anything they should be afraid of us, not the other way around.
Holding back technology didn't even work all that well with the USSR, despite them having to get off their asses and come over here to steal our technology, instead of hacking from their comfy office chairs like today. We wouldn't sell them VAXes, but they had VAXes... http://micro.magnet.fsu.edu/creatures/pages/russians.html