The mechanisms for using public fear to promote social movements can include the following: 1. **Information control and dissemination**: Control the flow of information through the media or social platforms, selectively publish or exaggerate events and data that may cause fear, and create a sense of urgency. 2. **Symbolic images and language**: Use strong visual images and language to stimulate emotional reactions and make fear concrete and intuitive. 3. **Authoritative support**: Quote the opinions of experts or authoritative institutions to prove the authenticity and urgency of the threat and enhance the legitimacy of mobilization. 4. **Community mobilization**: Organize or use community gatherings, meetings, etc. to strengthen people's collective identity and sense of participation, so that they believe that only joint actions can deal with threats. 5. **Emphasis on urgency**: Use countdowns, deadlines or catastrophic consequences to force the public to feel that they must take immediate action. 6. **Creating a sense of internal and external hostility**: By emphasizing the opposition between "us" and "them", people feel the possibility of external threats or internal betrayal. 7. **Provide solutions**: While creating fear, provide a clear solution or way out so that people believe that participating in the movement can eliminate fear. 8. **Repetition and persistence**: Continuously repeat relevant information and signals so that fear becomes a fixed part of people's thinking and becomes deeply rooted. These mechanisms can effectively stimulate the public's fear and drive them to participate in a particular social movement. However, using fear to mobilize people can also have negative effects, including social division, panic, and irrational behavior. Therefore, using these mechanisms requires a high sense of responsibility and a deep understanding of the consequences.