Only I did it for you, and you don't remember my poem.

I turn my heart to the bright moon, which shines on the ditch.

It means that I am kind to you, but you are indifferent and ungrateful, and your sincere efforts are not rewarded and respected.

The poem comes from the brilliant Pipa Story in Yuan Dynasty, which tells the joys and sorrows of scholar Cai and dancer Zhao in Han Dynasty. It is * * * 42.