Who owns the calligraphy and painting written at the calligraphy exhibition?

Calligraphy exhibitions or other exhibition competitions, calligraphy and painting works will generally be given to the organizers, which is an agreement between you and me. If you take part in the exhibition and occupy someone else's place to promote yourself, you have to make some compensation now. If you invite someone to the exhibition, you should not want this calligraphy and painting again.