Diligence and top students have basic problems, medium problems and difficult problems, which are equally difficult.

Teaching AIDS refer to all kinds of publications such as study counseling and examination counseling that are matched with teaching materials and used by students, including: synchronous practice publications of teaching materials, homework publications in winter and summer vacations, exercises and test papers in primary and secondary schools, and other publications such as study counseling and examination counseling for primary and secondary school students recognized by the administrative department of press and publication at or above the provincial level. Its product forms include books, newspapers, periodicals, audio-visual products, electronic publications and so on.