Teaching materials are the foundation, and 32 is generally suitable for topics with weak foundation, which is relatively simple. 53 is more general and suitable for the promotion stage. Generally speaking, 53 has high value and high gold content, and is also suitable for those with poor foundation. This is a phased process. I hope you pay attention to the textbook first, then to 32, and finally to 53. This is a process of self-adjustment.