Every Chinese national in the USA is a potential spy. Every single one of them in fact is more likely than not (especially the grad students in STEM fields).
The USA already has millions of them living here, just waiting for when China declares war against the USA. How many of them have ties to Senatorial staff (Dianne Feinstein just one example).
https://www.aei.org/op-eds/explain-the-chinese-spy-sen-feinstein/
Most Chinese immigrants, those not wetbacks, are good citizens with the caveat that their relatives in China are held hostage to their provision of all information they receive.