The first horizontal line should be Monday, Tuesday, Wednesday, Thursday and so on. This is the date.

The first column in the vertical direction should be the first category, the second category and the third category, all the way to the eighth category and the ninth category, and there is still time.

Where the horizontal and vertical intersect, if it is blank, there is no class. If there is no class, you can go to the self-study, the library or play, but students mainly study.

Where there are classes horizontally and vertically, look at the day of the week horizontally, look at the class vertically, and then look at the time and classroom name. According to the day of the week, you can go to any classroom and wait for the class five minutes in advance.

6 study hard.