The people of fairyland write the message of your lips using a pen made from the vein of a ruby.

Here, the poet praises the radiant crimson charm of the beloved's lips through a wonderfully fantastical image. He imagines that even the dwellers of Fairyland, when writing down a message spoken by those lips, must use a pen carved delicately from the very vein of a ruby. It is an exquisite metaphor suggesting that ordinary ink and worldly tools are far too plain to capture something so magical, sweet, and precious.