A poem in which gold indicates the author's age.

I want to know why my Jinse has 50 strings, and each string has a flower-like product. A youthful interval implies the author's age.

The whole poem is: I don't know why my Jinse has fifty strings, and each string is a flower-like interval. Zhuangzi daydreaming, a saint, was bewitched by butterflies, and cuckoo crowed in the imperial spring. Mermaids shed pearl-like tears on the moon-green sea, and the blue fields breathed their jade to the sun. A moment that should last forever has come and gone before I know it.