If it's a competition, it's better to choose independently, do it yourself and make your own ideas, so that the prize won will feel sweet from the bottom of my heart.
Personally, I think it is better to highlight the following points:
1.
2. The current social focus on civilized etiquette, and can add their own views;
3. Publicity posters, focusing on "publicity", have prominent themes and can attract people;
4. The design of the newspaper is novel, and the layout is generous and beautiful. You may wish to look at the layout of the newspaper and the excellent posters and posters on the Internet.
5. Show the most publicity content in a limited layout, and stick to the theme, which has propaganda and educational significance.