I don't know, but it's not just the US..it's all over the western world. I did my undergraduate I'm the US and the Chinese were everywhere. I did my MBA in Germany and they were all over there.. maybe worse. There's this YouTube channel called red pill Germany. It's run by a physicist from Germany. He's proudly nationalist (supports the AfD) has a lot of good things to say about Trump..every once and a while he does some videos of just observations and he talked about Chinese researchers. Basically he says when the Chinese come into the lab, everyone else deliberately avoids being there due to safety. https://youtu.be/iuQwbqTWJyE