[AdmSmith]

This is very bad and very foolish. Chinese researches should be kept at Universities, if they are hired in companies they can not resist the pressure from their home country.

http://observer.com/2016/08/breaking-chinese-mole-uncovered-inside-the-fbi/

The Unpleasant Truth About Chinese Espionage. Thanks to weak American counterintelligence and limited public awareness, the risk to Beijing is low while the rewards can be high

http://observer.com/2016/04/the-unpleasant-truth-about-chinese-espionage/

http://www.usatoday.com/story/news/nation-now/2016/04/29/chinese-nuclear-espionage-tva/83715490/

http://www.nytimes.com/2016/04/27/us/after-missteps-us-tightens-rules-for-national-security-cases.html

[TigerLikesRooster]

These people are not spies in a classical sense. They are usually ordinary Chinese who are leaned on by Chinese intelligence to cooperate. They have no years of training at a spy school. They are assigned to handlers who are spies. They will bring all kind of stuffs to their handler. Then handlers need to sift through them, find something useful and send it to their headquarter.

It is a dragnet operation. Nobody is a spy from start. So I am not sure marrying a Chinese woman/man from Mainland China is a good move if you deal with sensitive materials at work. Chinese intelligence will find you spouse and "persuade" him/her to cooperate. Of course, if you are an ordinary person, there would be no problem.