It's similar how the US banned all cooperation with China in space [1] because of some tropes about them being unable to do anything except steal American tech. That's why, to this day, there are no Chinese on the ISS. After that law China proceeded to develop, launch, and man their own space station, put a rover on Mars, and even carry out an unprecedented sample return mission from the dark side of the Moon, and just generally run circles around the US (except perhaps SpaceX) in space. Interestingly US researchers may not be able to access those Moon samples (which China shared with scientists worldwide) due to this stupid law.