1. Coverage of knowledge points: Wan Wei's supplementary teaching materials cover primary school, junior high school, senior high school mathematics, English and other subjects, and each knowledge point has detailed and easy-to-understand explanations, which can meet the needs of students of different ages and levels.

2. Reliable quality: The supplementary teaching materials of Wan Wei are compiled and produced by a professional team, paying attention to practicality on the basis of ensuring accuracy and authority. At the same time, after repeated proofreading and revision, the quality has been effectively guaranteed. These excellent features make this brand a trustworthy choice for many parents and teachers.