Preparing a large-scale street demonstration requires careful consideration and planning to ensure that the event is safe, legal, and effective. Here are some key things to pay attention to: 1. **Clear objectives**: Clearly define the purpose and demands of the demonstration so that participants can unite and convey information to the public and the media. 2. **Legal compliance**: Understand and comply with local laws and regulations, especially those regarding gatherings and demonstrations. It is usually necessary to apply for permits from relevant departments to ensure the legality of the event. 3. **Safety measures**: Develop a detailed safety plan, including evacuation plans in case of emergencies. Ensure that there are enough security personnel, especially in the event of possible conflicts. 4. **Route planning**: Choose a suitable march route or gathering point to ensure that it can accommodate the expected crowd and obtain approval from relevant departments. 5. **Communication and mobilization**: Use multiple channels (such as social media, email, phone, advertising, etc.) to mobilize and organize participants. Provide detailed information, including time, location, route, and recommended items to bring. 6. **Logistics support**: Ensure that there is enough food, water, medicine, and sanitation facilities to support large crowds. In addition, a dedicated team of volunteers is needed for coordination. 7. **Media Strategy**: Develop a media publicity plan to attract the attention of the news media and the support of the public, prepare spokespersons and press releases. 8. **Consider adversary actions**: Understand possible opponents and potential adversary actions, and prepare response strategies. 9. **Risk Assessment**: Identify potential risks and challenges (such as weather, adversary interference, participant safety, etc.) and develop appropriate measures to mitigate these risks. 10. **Evaluation and Feedback**: Review and evaluate after the event, collect feedback from participants, and accumulate experience for future operations. Preparing such a large-scale event requires rigorous organizational skills and teamwork to ensure the efficiency and success of the event.