You can write poems, couplets, famous sayings, famous sentences and words you can make up yourself. As for the inscription, the preceding paragraph reads: * * *, and the next paragraph reads * * * (the book was written on * * *), and more places, scenes and so on should be written. . . . . You can stamp it or not. Generally, some famous calligraphers don't like to stamp others, but only write their names, such as "The Mountain Man wrote it in * * year"-this is called "poor money"