If the calligraphy and painting is a piece of paper, don't fold it, please roll it up and put it away. Calligraphy and painting will break after repeated folding. Broken calligraphy and painting need to be framed.
Mounting is a unique skill to decorate calligraphy and painting, rubbings and so on. In ancient times, the name of mounting was called "mounting back and mounting surface", also called "mounting" and "mounting pool".