We offer “professional long-term maintenance” for wallpaper — including 1 free annual on-site inspection (checking wallpaper adhesion, cleanliness, and material condition) and daily care guidance (e.g., cleaning methods for different wallpaper materials, moisture/mold prevention tips). For high-wear scenarios (e.g., kitchens, bathrooms, balconies), we also provide quarterly local maintenance (e.g., gap sealing, stain cleaning) to help your wallpaper stay in good condition and effectively extend its service life.