Li Xiang, deputy to the Sichuan Provincial People's Congress and chief ophthalmologist of the Affiliated Hospital of Chengdu University of traditional Chinese medicine, recently proposed to launch the "lying down and sleeping" project for lunch break in primary and secondary schools as soon as possible. Qualified primary and secondary schools will change students' lying down and sleeping on their desks to lying down and sleeping, so as to fully ensure the quality of lunch break and reduce the probability of lying down and sleeping. Research shows that people who are too tired can learn 13% more efficiently than the average after taking a nap. This is because after intensive mental work in the early stage, fatigue can be eliminated through the buffer of lunch break, so as to create conditions for better focusing on learning. Good rest can improve learning efficiency and achieve twice the result with half the effort. On the contrary, many children's learning effect is poor, that is, they do not organically combine learning with rest. Long term fatigue learning not only has poor effect, but also easily breeds weariness. For a long time, the heavy burden of study has overdrawn the rest time of many students, resulting in insufficient sleep time for minors as a whole. In March last year, the report on the development of China's national mental health (2019-2020) released by the Institute of psychology of the Chinese Academy of Sciences showed that 95.5% of primary school students, 90.8% of junior middle school students and 84.1% of senior high school students did not meet the sleep length standard. In order to effectively protect the rights and interests of minors and better promote the implementation of the "double reduction" policy, in April 2021, the general office of the Ministry of Education issued the notice on Further Strengthening the sleep management of primary and secondary school students, which clearly requires that primary school students sleep 10 hours a day, junior high school students 9 hours and senior high school students 8 hours. Places and schools with conditions, Students should be guaranteed the necessary lunch break. Lunch break is not a new thing, but a practice that has lasted for many years, but there are no small differences in implementation. Generally speaking, a high-quality nap is most appropriate in 30 minutes, which is also a common practice in most places. In reality, it is not difficult to ensure the time of lunch break, but the existing practice of children sleeping on the table is difficult to change for the time being. The reasons are as follows: first, people have insufficient understanding of the harm of sleeping on their stomach, and their subjective initiative to change is not strong. From a professional point of view, students sleeping on their stomach will cause pressure on their eyes. In the long run, it is easy to induce eye diseases. In addition, unhealthy sleeping posture will also affect blood circulation and harm other parts of the body. Second, there is a lack of rigid assessment mechanism and the driving force of external constraints is not strong. From the pilot point of view in some places, it is not difficult for children to change from lying down to taking a nap. They can "make conditional use of conditions and create conditions unconditionally". For example, the first batch of pilot "lunch break" schools include Xinhua experimental primary school, Desheng primary school and Yongzheng experimental school in Hangzhou. These schools either turn some unused classrooms into students' nap rooms, or put cushions on the open space of the classroom according to local conditions to facilitate children's sleep, as well as customized multi-functional nap beds or purchase very comfortable sleeping pillows. Of course, more dormitories can be built, and even spare teachers' dormitories can be used to solve the dilemma of "insufficient hardware". From the current situation, it is not easy to change students' lying down nap in the short term. The Ministry of education's "sleep order" defines "what to do", but there is still a lack of assessment and restraint mechanism on how to do, with more flexibility and less rigidity. In particular, the requirement of nap is still in the promotion stage, and the elastic space is too large, so it is not easy for schools to make great changes independently. On the basis of recognizing the harm of lying down, it is urgent to put lying down and taking a nap into the agenda as soon as possible, and plan the timetable and road map. On the one hand, we should formulate scientific and reasonable guidelines, such as time, venue and other conditions, so that there are rules to follow for nap. On the other hand, it should be supplemented by corresponding guarantee mechanisms, such as supervision and inspection and performance evaluation. At a higher level, it can be included in the scope of juvenile protection, so that the "lying down" project of lunch break in primary and secondary schools can be implemented as soon as possible. (outlook new era)