The word Liu Ruwu comes from Li Shangyin's famous sentence "Sending Friends to the North on a Rainy Night" in the Tang Dynasty, which expresses the protagonist's heavy and painful feelings of missing the love of distant hearts. In this poem, Li Shangyin describes his feelings of having an affair with a woman, and shows his contradictory psychological state. Since then, Liu Ruwu has become an important vocabulary in China's classical literature, which is often used in poetry, novels, film and television dramas and other literary forms.
The word Liu Ruwu is widely used in modern Chinese, not only in the field of literature. The adjective Liu Ruwu can be used to describe beautiful aspects such as temperament, posture and charm, and can also be used to express the complexity of some emotions. For example, "The Girl with a Dark Flower as Clear as Fog" describes a gentle and elegant female image; "His thoughts are as vague as fog" expresses the complexity and unpredictability of a person's way of thinking; Of course, "Liu Ruwu's eye" can also be used to describe a gentle and subtle appearance.