Seems the fellow was a mathematician who worked with another mathematician at UCLA and was quite open about his affiliation with his military academy in China: https://www.math.ucla.edu/~wotaoyin/people.html
You do wonder what the point of it is apart from causing uncertainty for Chinese citizens, no sane Chinese scientist will set foot into the US, or they'll be hit with catch-all charges when the FBI doesn't like them.
You do wonder what the point of it is apart from causing uncertainty for Chinese citizens, no sane Chinese scientist will set foot into the US, or they'll be hit with catch-all charges when the FBI doesn't like them.