a trademark is a symbol used to distinguish the source of goods, which can be words, graphics, combinations, three-dimensional graphics or even sound (this item is not protected in China). Nameplates are just a form of expression of trademarks. Many trademarks are printed on packaging, some are woven and some are embroidered. Generally, large-scale mechanical equipment, vehicles and other commodities use metal nameplates to display trademarks, which are printed, stamped, cast and carved. Most of the signs on various cars are metal nameplates.