"Mo" refers to the land on the street or roadside, while "misty rain" describes that tiny raindrops form a layer of water mist in humid weather. In poetry, authors often use such language to describe a beautiful scene, which is usually a way to write about scenery, express emotions and chant things. Some works also use the allusion of "misty rain on flowers" to turn it into a metaphor to express tenderness for someone or something.
For example, Li Shangyin, a poet in the Tang Dynasty, wrote in "Notes for Northern Friends on a Rainy Night": "When you ask Jun to return, it rains late in the autumn pool. When * * * cuts the candle at the west window, it talks about the rain at night. " Among them, the artistic conception of Late Rain is similar to misty rain, which vividly shows the silence, obscurity and confusion in rainy nights and expresses the author's parting thoughts.