1. Preface and table of contents: the integrity of the overall framework of the textbook and the accuracy of the examination and subject description;

2. Content details: for example, whether the real questions are quoted, whether the real questions are old and new, whether they are representative and typical, or whether the simulation questions are similar in difficulty to the real questions over the years, whether the analysis is convincing, and whether the narrative is concise and easy to understand, which fully reflects the basic quality of the book.

3. Book system: Candidates need to check whether this set of teaching materials is complete, whether it has been classified and studied in depth according to the characteristics of the exam, and the teaching materials, real questions and simulation questions are one set, and the provinces are divided into multiple sets according to the real questions;

4.R&D team: It is particularly important to have an experienced and professional R&D team.