Stabbing at school results in boy's death

However, the teacher in charge of the class and Liu's father said in the chat group that they did not know about any bullying.

The teacher in charge told Wang that he should first inform the teachers of the matter, and that it is the teacher's duty to find out what was happening and deal with the matter appropriately, instead of taking matters into his own hands. Liu's father tagged Wang in the chat group and offered to talk in private, according to the screenshots.

The Commission for Political and Legal Affairs of the Communist Party of China Central Committee said on its WeChat account late on Sunday that it strongly opposes school bullying, and does not regard school bullying only as a small problem among students; but it also opposes seeking revenge through violence.

"No matter what the motives are, there are only law-abiding citizens and those who violate the law," it said.

China has seen a number of bullying cases on campuses that ended in severely injured juveniles. The most recent case involved two first graders in Gansu province who beat up an 8-year-old girl in December and seriously injured her genitals. Several school officials were suspended from work, but the two wrongdoers were spared criminal responsibility because of their young age.

Zhang Jing, head of the Family Development Research Center at China Women's University, said school bullying is rampant on campuses.

"Factors such as more education about the vulnerability of life and parent-teacher communication could affect the frequency and severity of bullying," she said.

Zhang suggested enacting a law that focuses on campus security to supplement the current legal provisions, which would help tackle the problem at its roots. She also called for more parental involvement in understanding the issue and helping to report potential threats.