The FBI is warning students studying abroad to be careful about offers from foreign governments. An FBI re-enactment video shows former Grand Valley State University student Glenn Shriver accepting a seemingly innocent offer to write essays about the Chinese government.

From prison, Shriver says it doesn't take much to fall into the "spy trap".... even if the warning signs are obvious.

"If someone is offering you money, and it doesn't seem like you don't have to do anything for that money, then there is probably a hook in there that you are not seeing."

In the video, Shriver eventually becomes involved in a scheme to join the CIA but spy for the Chinese government. Shriver was sentenced to federal prison in the U.S. for attempting to provide national defense information to China.

See the video CLICK HERE