I saw how charming Qingshan was, and I expected Qingshan to see me as well. Which song is this from?

This poem came from the Tang Dynasty poet Bai Juyi's "Fu De Gu Yuan Cao Farewell." The whole sentence was: "I see the green mountains more charming, and the green mountains see me the same." The meaning of this sentence is: "I see Qingshan very charming and charming, but Qingshan also sees me the same way." The theme of this poem was to express the poet's reluctance to part and his longing for his homeland.