That was not the case. The current high school textbooks are divided into compulsory and elective contents, such as science, and the compulsory part.

Compulsory 1, Compulsory 2, Compulsory 3, Compulsory 4, Compulsory 5, Elective 2- 1, Elective 2-2, Elective 2-3 (these three electives are actually compulsory contents), Elective 4- 1, Elective 4-2, Elective 4-3 and Elective 4-4.

Take Beijing as an example. Senior one: General compulsory course 1, compulsory course 4, compulsory course 5 and compulsory course 2 will be completed in order.