According to Dai's education information in Guangxi, the charging standard of after-school service for primary and secondary school students in the compulsory education stage of Bobai High School connecting campus cannot exceed the standard of 1 0,000 yuan per semester. It is also mentioned that self-study classes can be offered on working nights in junior high schools and senior high schools, and the time for self-study in the evening should not exceed 20: 30 in principle.