Personally, I think the 24-hour online Q&A in the seven-day class is very useful. For her, the biggest reason why her math scores have not improved is that there are too many problems and new knowledge points increase, which leads to a vicious circle. In the seven-day class, because there is a special tutor, every time she has questions about the content of the class, she sends the questions directly to the tutor through the VIP question and answer group. No matter how late it is, the teacher will help her solve the problem. Many times, as a guide, the tutor taught her the idea of solving problems and let her find her own methods and skills of solving problems. With such a guided answer, she has a sense of accomplishment every time she finishes a difficult problem, and she is more and more confident in mathematics.