Gao Yi resin roof tile product numbers include information on specifications, batch, and date, and are typically printed on the back of the tile or on the side of the packaging box. The number consists of a specification code, a batch number, and the year and month; the first two digits represent the thickness or model, the middle four digits indicate the batch, and the last six digits denote the year and month. If the tile number has faded, check the label on the packaging box for complete information.
