School bullying refers to the act of long-term, repeated intentional injury that the bullies conduct on those who are bullied on campus. Middle school and high school are the phases when campus bullying happens the most often, and the main form of bullying is usually physical violence. There are also verbal, social and cyberbullying, especially since the developments of online blogs. What terrifies us is not just the bullying itself, but also the collective silence. The bystanders, who may seem to be in the position of a third party, are actually part of the violence. Make every teenager aware of the consequences of school bullying and how serious it is; Let everyone who has suffered from school bullying could get help from us; Let every bystander stop "keeping quiet".