What is the basis for the compilation order of the new curriculum textbooks for senior high school mathematics published by People's Education Press? Spiral upward? Why should we follow the mandatory order of 12345? The old textbooks are arranged in logical order, and the new textbooks are arranged in cycles according to the content.

The textbook is 14523 instead of 12345. Then arrange different contents according to the arts and sciences. For example, in science, after completing the required courses, take 2-3, 2-2, 2- 1. The content that appeared in the compulsory course book before will be recycled once in the elective course book.