Some psychological techniques may indeed be used to exert invisible pressure or make people feel threatened, but I want to emphasize that this kind of manipulation is morally problematic. These techniques include： -The blackening effect under the light: creates a subtle sense of fear or uncertainty -Emotional blackmail: influence behavior by suggesting negative consequences -Silent treatment: deliberately not responding to create psychological pressure -Pretend to be pitiful strategy: Use the compassion of others to cause guilt -Vague threats: vague warnings create anxiety Understanding these skills should mainly be used for self-protection and identifying when you are being manipulated. Healthy interpersonal relationships should be based on respect, transparency, and sincerity, not manipulation and pressure. If you feel affected by this kind of technique, it may be helpful to seek professional psychological counseling.