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By improving the structure of the existing wallpaper, a double-layer wallpaper can be designed to prevent the fire from spreading when a fire occurs, and people can tear off part of the outer fire layer to protect themselves from the fire.Modular wallpapers are widely distributed at home and can be used by many people anytime, anywhere.When a part of the wallpaper is damaged or dirty, we can use the modular features to tear off the outer wallpaper for replacement. This can save users time and cost and avoid waste of social resources.