jewelry vials wholesale I see a special mark on some panda gold and silver coins, such as "s", "y, etc.", what does this mean?

wholesale jewelry marketplace SummarynHello dear, I see some panda gold and silver coins with special marks, such as "s", "y, etc.", which is the mark of the production sitenConsultation record · Answer on 2021-12-25nI see a special mark on some panda gold and silver coins, such as "s", "y, etc.", what does this mean? Hello dear, I see some panda gold and silver coins with special marks, such as "S", "Y, etc.", which is the label of the production site.