China's top judge Zhang Jun visited a Beijing middle school on Friday to teach on how to prevent juvenile crimes and protect children's legitimate rights .

As the vice-principal of the Beijing No 2 Middle School, it is the seventh time that Zhang has been to the campus to share legal knowledge, cases and judicial stories with students.

While pointing out the reasons behind juvenile delinquency, including internet addiction and lack of family education, Zhang, president of the Supreme People's Court, also called on students during the Friday's class to prevent crimes from the root by enhancing legal awareness.

He emphasized the importance of family care, suggesting parents pay more attention to teenagers' mood and guiding the young people to brave negative emotions when suffering setbacks.

"It's also essential for schools to establish emergency systems and take urgent measures in the face of conflicts between students, such as school bullying, because the stronger supervision and scientific management will become a 'protective shield' of the adolescent healthy growth," he said.

"Some situations that are easier to trigger bullying, including isolation and teasing classmates, should be avoided," he said, adding that more care need to be given to left-behind children.

In addition, he called on cyberspace administrations and online service providers to apply new technologies, such as artificial intelligence and big data, to strengthen the monitoring of content to ensure what they provide are healthy enough for young users.

The law education was conducted both offline and online, with legal materials, law books and a short educational play provided.