The move, announced by the Ministry of Education on Sunday, is part of enhanced measures in secondary schools aimed at promoting healthier screen habits.
Under the new rules, students' devices will be kept in designated storage areas or school bags throughout school hours. Schools may, however, grant exceptions in necessary circumstances, the ministry said.
"Screen use among students has been shown to displace important activities such as sleep, physical activity and social interactions with friends and family, and is linked to poorer holistic well-being," it noted.
Xinhua
