"Everything is a dream at the end of the day, Hugh Hugh, tomorrow's yellow flowers and butterflies are also sad." The last sentence of "tomorrow's yellow flowers and butterflies are also sad" is from Su Shi. Yellow flowers refer to chrysanthemums, and it was a custom to appreciate chrysanthemums on the Chongyang Festival. The whole sentence is a metaphor for something that has become obsolete. Because it was too elegant, it was passed down to the people, and yellow flowers became yellow cauliflower. The word "butterfly" in the sentence also sounds the same as "dish". Commonplace. Yellow cauliflower in the dish for a long time will not be cold? So the blackmail, on the "tomorrow's yellow flowers butterfly also sad" evolved into "yellow flowers and vegetables are cold".