The content of calligraphy works hanging in the school library is actually very wide, as long as the content is calm and meaningful.

You can hang an inscription on Liu Yuxi's humble room.

Or Li Bai's "Into the Wine"

You can also find some contents in the Book of Songs and the Book of Changes.

It is better to have a longer space, otherwise it will appear empty. Don't hang "dragon" or "tiger" or anything.

A lot, no matter what, running script, cursive script and official script can be used.