If you hire a Chinese National,  he or she will send your business information to China.   Not even a chance they won't.  Same deal with reparations payments to Mexico and where the labor for illegal weed grows deep in the Oregon Wildernesses come from.  The authorities,  the government folks involved in stealing trade secrets and the narco trade will kill your beloved grandmother,  grandfather,  sister,  whomever,  back in the home country if you don't comply.  

OSU hired a Chinese PhD for berry crops research.  I knew farmers who wouldn't let him on the farm,  talk to him.   US R&D is a target,  at all times,  and essentially there is no real effective off shore protections for ideas,  patents,  confidential information,  proprietary process information.