This has been a problem nobody wanted to touch for a long time. We create so much technology, we just let foreigners come here and learn how to make it then compete against us in the world market. How about we not let any foreign students or nationals have access to any of this technology?
https://www.reuters.com/article/us-usa-china-students-exclusive/exclusive-fearing-espionage-u-s-weighs-tighter-rules-on-chinese-students-idUSKCN1NY1HE
https://www.reuters.com/article/us-usa-china-students-exclusive/exclusive-fearing-espionage-u-s-weighs-tighter-rules-on-chinese-students-idUSKCN1NY1HE