The south wind knows my thoughts, the little birds know my heart. It was from the Tang Dynasty poet Li Shangyin's Untitled. The meaning of this poem was that the north wind could know my thoughts and the little bird could understand my feelings. This poem was widely praised and used by many literary schools to express love. It is usually interpreted as a lyric poem that is used to express feelings of love, desire, and longing. This poem was widely read and sung, and many people considered it a classic in the history of Chinese literature.