What does the Ministry of Education mean by "five tubes"?

Legal analysis: The five management systems of the Ministry of Education refer to mobile phone management, sleep management, homework management, reading management and physical fitness management.

Legal basis: Notice on Strengthening the Management of Mobile Phones for Primary and Secondary School Students

Notice on further strengthening the sleep management of primary and secondary school students

Notice on strengthening the management of homework in compulsory education schools

Measures for the administration of extracurricular reading materials for primary and secondary school students entering the campus

Notice on further strengthening the physical health management of primary and secondary school students