It should not be a "black bear", but a "bear". In cooperation with Xiaoxiong Book (Wuhan Relay Book Publishing Co., Ltd.), a series of recognized supplementary books have been published:

First, synchronous classes (one-to-one correspondence with different versions of textbooks and courses around the country)

Complete interpretation of teaching materials (7-3), complete learning plan of teaching materials (3-7) and complete interpretation in class (5-5).

Second, the general review class

Junior high school: a complete interpretation of the senior high school entrance examination and a complete study plan for the senior high school entrance examination.

Senior high school: complete college entrance examination interpretation, complete college entrance examination study plan, complete college entrance examination evaluation, college entrance examination 1 to 1, college entrance examination 12.

Third, others.

"600-point topic" (special study and training), "600-point problem-solving encyclopedia" (high school grades, mainly explaining the problem-solving methods), "Exam must be remembered" (booklets written with useful knowledge points in junior and senior high schools) and so on.