Good wallpaper is that when you touch it, you'll feel skin-friendly, soft and comfortable, symmetrical thickness.
Good wallpaper, which meets environmental standards, is that when you smell it, there is no plastic or ink taste.
Good wallpaper is with fabric mechanism and symmetrical fiber in the sunshine or light.
Introduction: Erasing the pencil trace on the wallpaper surface with eraser, if the wallpaper is intact, it is good.
Shaking the wallpaper, if you hear gentle sound of fabric, it is good wallpaper.
When you tear out the wallpaper, if you see the environmental fiber filament in the center, it is good wallpaper.