The logos on the back of ceramic tiles generally have specific shapes, such as triangles, squares, ovals, etc. Each logo represents a different brand and product type. The triangle logo represents imported ceramic tiles, the square logo represents domestic ceramic tiles, and the oval logo represents the brand and type of ceramic tiles. In addition, the back of the tiles will also have information such as brand, type, specification, origin, etc., and the brand and type of tiles can be identified based on this information.