1. Use simple pictures: minimize picture elements and highlight the product image of laver.

2. Use bright colors: Choose bright and attractive colors, such as dark green, red and yellow, to make the poster more attractive.

3. Use interesting patterns, such as cartoon patterns and marine elements, to make the poster more interesting.

4. Highlight brand elements: add brand names, slogans and other elements to posters to enhance brand awareness.

5. Keep the layout coordinated: pay attention to the collocation of words, patterns and colors, so that the overall picture is coordinated and beautiful.