The pianist carved his name (now a computer laser engraving machine). This is a normal business behavior and the need of commodity registration. Daily necessities are very common. Even Mr. Zhang, an amateur expert in Shandong who is familiar to friends, never forgets to engrave his name when making his own piano. He can't carve the piano I used to make. However, it is inevitable that there will be "hanging sheep's head" in the market, and some may be worse ... In fact, musical instruments are not a dress that looks beautiful and looks old. It is never good for an instrument not to make a good sound, and naturally it loses all its existing value. The purpose of playing musical instruments is to seek true inner perfection. Wuling doesn't mean it's not icing on the cake in appearance, everyone likes it.