Hong is a bird by the river, sorrow is autumn in the heart, and the heart follows the bird. When the river goes and autumn stays, it means: the bird by the river is the word Hong, Hong represents swan goose, and swan goose represents the feeling of longing. The word "sweetheart" is "you", and the word "you" is above the heart, so the interpretation is that you are out of reach. In the end, we still can't be together, and the person we love is out of reach. The bird on the riverside is the word Hong, Hong represents Hongyan, and Hongyan represents the feeling of longing. The word "sweetheart" is "you", and the top of the heart is the word "you", so the interpretation is that you are out of reach. This sentence expresses that the person you love is out of reach, that is, you are lovelorn.