"5+2" refers to the school's after-school service five days a week, at least two hours a day, and the end time is connected with the local normal off-duty time. After-school service, as an important measure to implement the "double reduction" policy, is an extension of the comprehensive service of school education. In order to further enrich students' after-school life and let children make better use of their after-school time to improve their comprehensive quality, more and more delayed courses have been launched all over the country, and a new educational service form of "3: 30 after class" has been developed.