What's the meaning of that couplet rolled up

The phrase that couplet has rolled up its edges is meant to convey that the edges of the couplet appear to be folded and rolled up, which affects its own beauty.

Couplets, also known as couplets, spring couplets, are pairs of statements written on paper, cloth or engraved on pillars, and are also a unique art form of the Chinese language that belongs to the traditional Chinese culture of one word and one tone.