Qiantang Yongzheng is as difficult as walking into a heavy height. Among them, from the example setting of each chapter, Qiantang Yongzheng is not comprehensive enough in typical problems, and the problem-solving process of some examples is too general, while Walking into Heavy Height is explained by famous teachers, which summarizes the law of knowledge, introduces the thinking method of the topic and provides skills for understanding and memorizing knowledge points.

These are all teaching AIDS, the abbreviation of "teaching guidance", and the general name of teaching guidance books, also known as synchronous guidance and reference books. They are reference books for supplementary teaching materials, and usually consist of knowledge explanation and exercises.