In the days of the twenty-first century, people use a variety of machines, really the existence of a variety of machines to bring great convenience to people, the last time we also went to a friend there found a laser engraving, we had no idea before what laser engraving is used for, laser engraving We were very interested in our friend’s laser engraving. My friend taught us how to use the laser engraving and reminded us to pay attention to the operation when using the machine. Otherwise, the damage to the machine was very serious. I was really there with my friend that day. Learned a lot of knowledge, but also a very happy day.