According to Taobao's query, first of all, Wang Houxiong's motif description is comprehensive, including most knowledge points and problem-solving methods of high school mathematics. Secondly, it is relatively difficult for Wang Houxiong to trace the theme of this book. For some students with weak foundation or learning difficulties, it may take more time and energy to understand and master the knowledge points and problem-solving methods in the book. Therefore, it is suitable for students in Grade Two, not for students who are still laying the foundation in Grade One.