In principle, it is a product and a picture, except for handicrafts and ornaments. According to tens of thousands of certificates I have made, diamonds, jadeite and other jewelry are one product and one picture, while silver commemorative coins are ordinary pictures. I don't know if there are any legal documents. I haven't heard of them. Anyway, the laws in China are not perfect in many aspects. In addition, don't blindly believe that every inspection is the same. What about the national inspection? One person has to make so many goods in one day.