The first type: you are a student, if your major belongs to the following sensitive majors; Either you have already worked, but you have obtained a degree in the following majors, or your work involves the following sensitive majors.
The second type: going to the United States for meetings, business trips or exhibitions. If companies related to the above fields have exchange activities, they need to provide their resumes and information of the other company.
Military technology, nuclear technology, rockets and drones, electronic navigation, remote sensing imaging, chemistry, chemical engineering, biology, biochemical engineering, advanced computers, microelectronics.