Preparation plan for the second year: before April, give priority to senior books and lay a solid foundation. From April to June, with the foundation of advanced mathematics books, I began to read the whole book and do various exercises. Almost the summer vacation began to strengthen the stage, and I brushed two books and exercise books, and the real questions began one after another over the years. If you don't keep up with the previous progress, you can start from the real questions in the following years. After the summer vacation, I will brush the whole book workbook three times in September and brush all the real questions over the years. If you have spare capacity, you can start doing simulation exercises for one year in succession. After math gets hot, it won't take much time. There is a set of simulated test papers every day until the exam.