Design class rules. The steps of displaying relevant public information on a4 cardboard are as follows:

1. Prepare a blue vertical cardboard.

2. In the upper left corner of the card, draw two children reading a book.

3. In the upper right corner of the card, write down the class rules.

4. Draw a square border under the card.

5. Within the border, write class rules.

6. In the lower right corner of the card, you can add some small elements to make the card more beautiful, and the class convention will be completed.