1. Prohibiting cellphones
2. Anti-cheating cardboard boxes
3. Diligent supervision
4. Horse blinder-like hats
5. Stripping down to underwear
6. Real-time surveillance
7. Anti-cheating folders
8. Going through the metal detector
9. Vintage anti-cheating hats
10. Anti-cheating hats
11. Drone supervision
12. Anti-cheating umbrellas
13. Anti-cheating hats
14. Anti-cheating cardboard boxes
15. Anti-cheating hats
