Mobile phones have become an important part of our daily lives. However, to protect students' eyesight, make sure they focus on their studies, primary and middle schools will have more specific rules to limit students' mobile phone use on campus.

The Ministry of Education gave a notice that limits primary and middle school students' carrying mobile phone use at school in January, 2021. Those who still require their phone for some reason must get their parents' and teachers' permission and must hand their phones over during class time.

The purpose of this new rule is to help students focus on study and prevent them from being addicted (成瘾) to the internet and games. According to a 2020 report by the China Internet Network Information Center, China had 175 million internet users under the age of 18 in 2019, with 74 percent having their own mobile devices.

This is worrying, because long-time use of mobile phones harms children's eyesight, cervical (颈部) vertebrae (脊椎) and even the brain, according to the World Health Organization. Many schools have taken measures to limit students phone use on campus.

Before the new rule , Li Wen, an English teacher in Shantou, noticed that many students brought their phones to school. Some even played games on them during class. Now the situation has improved since the notice was given.