I remember when my brother was in school, he always had UV printer homework. Every time for his homework to be more convenient, I would take a long line to print materials for him until one time he had done all his other homework, and the homework I had printed for him was not fun. Besides, I had a long line at that time. I didn’t print it out for him and thought it would take a long time to print it for him every time. Then my mother decided to install a UV printer for his family. After that, you don’t have to queue up to print data, you can finish it at home. At the same time, printing materials at home can help my brother with his homework.