1. The colors of curtains and wallpaper must complement each other. If the wallpaper is plain, then the curtains can be a little fancy.

2. The colors of wallpaper and curtains should be in harmony with the overall tone of the room. Curtains and wallpaper should match the overall home environment, which has become the default rule for purchasing curtain wallpaper.

3. Curtain wallpaper is integrated with decoration style and furniture layout, which fully embodies this rule.