In junior middle school, she tried hard to lose weight and used her pocket money to buy cheap skin care products as a result of verbal abuse about her appearance. In senior middle school, her demeanor was self-abased, blaming herself for being bullied, which led to poorer grades.

She's reluctant to mention her experiences, and now calls herself "a guardian of the victims of campus bullying, rather than a victim".

"I'm resolved to protect those in need of courage and love facing the scourge of school bullying head-on. I hope those who are being bullied know that they have the ability to fight back," she says.

Chinese schools offer lectures, guidebooks and psychological counseling about bullying.

Xizi suggests that Chinese schools can learn from the research-based anti-bullying programs of other countries, including KiVa from Finland and Olweus Bullying Prevention Program from Norway, which increase adult and bystander responsiveness to school bullying.

"Campus bullying is a persistent, global ailment. In some situations, the offenders don't have to pay a high price, but the victims might end up suffering for their whole lives, especially psychologically," she says.