There are many ways to get people together in a public place in a short period of time. Here are some common methods: 1. **Social media**: Use platforms such as Weibo, WeChat, Facebook, Twitter, etc. to quickly spread event information and attract attention and participation. 2. **Instant messaging tools**: Send notifications and invitations through WeChat groups, QQ groups, Telegram groups, etc. to facilitate quick contact and organization. 3. **Posters and flyers**: Post posters or distribute flyers in key locations to clearly state the information and time and place to attract the attention of passers-by. 4. **Word of mouth**: Use the power of friends, family or communities to spread word of mouth and encourage them to invite more people. 5. **Event planning website**: Post event information on event platforms (such as Eventbrite, Meetup) to facilitate people to sign up and participate. 6. **Dynamic updates**: Update event progress in real time and increase event exposure through short video platforms such as Instagram Stories and TikTok. 7. **Sign-in rewards**: Set sign-in rewards or participation benefits to attract people to gather in public places. 8. **Cooperation with local businesses**: Cooperate with local businesses to offer discounts or activities to attract customers to participate. 9. **Celebrity/opinion leader effect**: Invite celebrities or local opinion leaders to participate and attract their fans to come. 10. **Emergency or special topics**: Calling for attention and participation around social hot spots, emergencies or important topics. When using the above methods, it is necessary to ensure the safety and legality of the activities and comply with relevant laws and regulations.