I'm from Guangdong, and I think someone else taught me. There are 5 compulsory Chinese books and more than 0 elective Chinese books/kloc-0. English 5 is required and 7 is optional; Mathematics 5 is compulsory, 5 ~ 6 is optional, and 2 is optional; Chemistry is two compulsory courses and four elective courses; Physics is two compulsory courses and 4 ~ 5 elective courses; There are 3 compulsory courses and 3 elective courses in biology. I study science and have three compulsory courses: history, politics and geography. You have to finish all the required courses in senior one, but don't worry, you don't have to learn all the elective courses.