Politics: There are five books in the textbook of People's Education Edition, one for each semester, which are economic common sense of Grade 11, philosophical common sense of Grade 2 and political common sense of Grade 3. In other words, the political lesson will not end until the end of the first semester of senior three. * * * Study for two and a half years.

History: It only takes one or two semesters to start classes, but it will be gone when you get to the second year of high school. * * * study for one year. Of course, except for liberal arts students in the 3+2 exam mode.

Biology: Biology classes begin in Grade Two, and science students study until the college entrance examination. Liberal arts students only need to study for one year in their sophomore year.