What do you mean, poetry is printed on books?

"Poetry seals the feelings of books" refers to expressing feelings through poetry, seals, calligraphy and other artistic forms. Poetry is a literary form used to express feelings and inner feelings. Seal is a kind of carved or printed symbol, which represents a person's identity or power; Calligraphy is an artistic form with characters as the object of expression. Therefore, "poems printed on books" can be understood as conveying emotions and inner feelings and expressing people's thoughts and emotions through these artistic forms.