What's the name of the dust-free copper mask?

Dust-free copper masks are called bronze masks. Dust-free copper masks are usually called "bronze masks" or "copper masks" for short. This kind of mask is usually made of traditional China copper coins. Because of its gorgeous and mysterious appearance, it is a very unique and important element in China traditional culture. Ancient actors often used copper masks in theatrical performances and dance performances to increase their sense of drama and art.