Textbook highlights first appeared on 20 18. A seemingly young brand actually has the gene of "700 points for 600 points".

The cover of this book is relatively simple, with blue as the background. The background color of different themes is blue, and different colors are used to distinguish the themes in the topic. Generally speaking, it is not fancy and simple, and it gives people the feeling that it is a relatively stable teaching aid. In terms of printing, this book is printed in full color, and the adjacent two editions are different in color, with good discrimination, which is not depressing and has no long narrative.