The idiom "beauty alone lights" comes from a poem by Du Fu, a poet in the Tang Dynasty, "How beautiful a beauty is, open a pearl window and sit on a beautiful girl. Now you can see the tears on her cheeks, but you can't see the person she loves." The idiom "beauty" refers to beauty, while "lonely lamp" refers to the lamp that lights up when you are alone. Through the word "companion", the whole idiom vividly depicts a beautiful woman walking alone at night with only a solitary lamp as her companion. This idiom is often used to describe a lonely and desolate atmosphere, or to express someone's inner loneliness and loneliness. It is not only a description of the actual scene, but also contains the poet's feelings about the life situation, and regrets that the good things can not be cherished and cared for as they should be. In literary works, "lonely lamp beauty" is often used to render the atmosphere, increase the emotional depth of the story, and let readers feel the inner world of the characters empathetically.