1. Prepare cardboard: prepare a rectangular colored cardboard as the bottom plate of the placard.
2. Write slogans: Write concise and powerful legal slogans with clear fonts and colors on cardboard to attract people's attention. Draw a box under the slogan to highlight the importance of the slogan.
3. Draw patterns: Around the box, you can draw some patterns related to the legal system to increase the attraction and expressiveness of the placard. Write the class and name of the producer on the back of the card for identification and attribution.
4. Paste the campus: paste the placard in a conspicuous position on the campus with glue, such as the door of the classroom or the wall of the corridor.