1. You can choose dragon as the theme, or you can combine dragon with New Year's Day elements. After determining the theme and style, you can better choose colors, fonts and patterns.

2. Collect some pictures, patterns and characters related to the Year of the Loong and New Year's Day on the Internet or in the library for reference in painting.

3. Choose colors related to the Year of the Loong and New Year's Day, such as red, gold and yellow. These colors are usually associated with celebration and auspiciousness, which can increase the festive atmosphere of posters.

4. Add words related to New Year's Day to the poster, such as "Happy New Year" and "Congratulations on making a fortune".

5. Check the details of the poster carefully to ensure that the text is clear and easy to read, and the graphics and colors are in harmony. If necessary, it can be fine-tuned and modified.

7. After the design is completed, choose a suitable printer to print out the poster and display it in the right place.