Legal basis: Notice II on strengthening the management of mobile phones for primary and secondary school students. Detailed management measures. Schools should incorporate mobile phone management into the daily management of schools, formulate specific measures, clarify the place, method and responsible person of unified storage, and provide necessary storage equipment. We should set up a public telephone in the school, set up a communication hotline for class teachers, explore the use of electronic student ID cards with call function or provide convenient ways for other parents to contact students to solve the call demand between students and parents. Strengthen classroom teaching and homework management, and do not use mobile phones to assign homework or require students to use mobile phones to complete homework.