This is a sentence in Li Qingzhao's poem "Like a Dream": Like a dream, the rain blew suddenly last night. Deep sleep won't leave a hangover. I asked the shutter man, but he said, "Haitang is still there." Do you know that?/You know what? Do you know that?/You know what? It should be green, fat and thin! It means: "But it is said that' Haitang is still there'. Do you know that?/You know what? Do you know that?/You know what? It should be green, fat and thin. " After all, the protagonist still knows that it is late spring. Besides, last night was a stormy night, and begonia flowers will definitely be different. So, she used two "know not" to correct the reply of "shutter man". The tone of spoken English makes these two "do you know" people feel quite fresh. The phrase "green, fat, red and thin" describes the current situation. This sentence is the most famous one in the world. Very novel and vivid, seemingly handy, but in fact unique skills. She used the word "green" to refer to the green leaves on the branches, red to refer to the flowers on the branches, fat to replace "more" and thin to replace "less", thus writing a brand-new artistic conception. It's no wonder that ci theorists in past dynasties have praised it. For example, in the Record of Poems in Caotang, it is said that "every sentence is especially neat, implicit and meaningful." On a deeper level, "red" refers not only to flowers, but also to colorful scenes and colors in spring, to many beautiful things in spring and to happy mood in spring. The word "red and thin" vividly wrote the characters' feelings of hurting spring. It's the most classic sentence in this word. It doesn't need to be outspoken, but it's exciting.