What pictures should be hung in the principal's office?

You can hang some pictures to cover up your behavior, such as "notarization and honesty" and "the world is public", or draw a picture with the theme "Never take bribes and bend the law". The content is concise and clear, not too exaggerated, so that subordinates or leaders can look comfortable and not too ostentatious. You can't draw with the theme of "pay attention to each other first". Parents of students will understand the meaning immediately when they see it.