US visa sensitive occupations

The following majors are easily rejected:

1. Majors in the field of conventional ammunition.

Technology and armed systems involving warheads, large-caliber artillery shells, reactive armor, etc.

2. Nuclear technology major.

Technologies related to the production and use of nuclear materials and situational applications. These include technologies related to high energy physics such as the concentration of fissile materials.

3. Missile major.

Technology related to aircraft and missile systems. Development technology for satellite launch vehicles, including ballistic missiles, space launch vehicles, space rockets, unmanned aerial equipment and payload vehicles.

4. Major in aircraft and missile propulsion systems and vehicle-mounted systems.

Propulsion technologies related to near-Earth hypersonic flight of aircraft and missiles. Many of these technologies are dual-use. These include liquid and solid rocket propulsion system technology, missile propulsion system and system integration technology, independent rocket state or separation mechanism, aerospace heat-resistant high-performance structure and propulsion system test facility technology.

5. Navigation and guidance control major.

These capabilities directly determine the launch accuracy and lethality of both unguided and guided weapons. Technologies include those related to interior navigation systems, tracking and terminal awareness devices. Flight and vehicle control systems.

6. Major in chemical and biological engineering.

Primarily the ability to develop, produce and disseminate toxic chemicals. This technology can be used to make chemical and biological agents and is relatively common in many countries. Related technologies include mutagens, mycology, neurotoxins, toxin-making chemicals, etc.

7. Professional remote shooting and investigation.

Remote sensing technology can be used for dual purposes, not only for civilian imaging projects, but also for military reconnaissance projects. The reconnaissance capabilities of unmanned aerial vehicles and remotely piloted aircraft can be enhanced. These are technologies related to remote sensing satellites, such as imaging systems, high-resolution cameras and optics, etc.

8. Advanced Computer/Microelectronics Technology Major

Promote the development and deployment of computers and software in missiles and missile systems, and facilitate the development and production of nuclear weapons. The technologies include: airborne early warning positioning, electronic countermeasures processors, microcomputer compensated crystal oscillators, etc.

9. Materials Science and Technology Major.

Mainly involved in composite materials, metals and ceramics for aircraft, spacecraft, missiles and underwater vehicles. Polymers that provide seals and sealants for containing defined fluids and lubricants for a variety of vehicles and equipment. Selected specialty materials have special abilities that can develop electromagnetic attraction, magnetism and superconductivity. These technologies are related to advanced metals and alloys, non-composite ceramic materials, ceramics, cermets, organic carbon materials, polymeric materials, etc.

10. Information security major.

Technology related to encryption and decryption systems to ensure the security of confidential communications, video, data and related software.