Porcelain veneering refers to a method of fixing thin-layer porcelain-fused-to-metal restorations on the lips and cheeks of the affected teeth with adhesive materials without grinding or less grinding, so as to repair the defects that affect the appearance and cover up the defects such as discoloration. Porcelain veneer is a porcelain-fused-to-metal whitening restoration covering the surface of teeth. It uses bonding technology to preserve dental pulp, and covers tooth surface defects, colored teeth, discolored teeth and deformed teeth with porcelain whitening repair materials to restore the normal shape of teeth.