What are the effects of copying artifacts and practicing calligraphy? Has anyone used it?

Copying artifact, also known as projection calligraphy copying table or copying table, is a new type of calligraphy practice tool, which can effectively shorten the practice time and improve the learning efficiency, and the product effect is very good. Our school built two professional calligraphy classrooms with this copying artifact. Now the students are learning calligraphy in the new classroom. I am a calligraphy teacher in this school. I bought a portable copy desk myself. Friends who have nothing to do at home and like calligraphy. I recommend it to you.