Swallowing thin and fat is to describe the different shapes of women, each with its own beauty. It also means that works of art have different styles and strengths.

The source is Su Shi's poem Sun Xin's Old Man Begging for Mo Miao Pavilion in Song Dynasty: "Ling Du's storytelling is expensive, thin and hard, and this theory is not supported by the public. Short, long, fat and thin have their own states. Who dares to hate Yuhuan Yan Fei? " Among them, Huan Fei refers to Li Longji's imperial concubine Yang Yuhuan, known as Yang Guifei in the world; Yanshou refers to Zhao, the second empress of Emperor Wu of the Han Dynasty. She is a great dancer and was awarded the Zhao Yi with her sister Zhao Hede. She has been spoiled by the emperor for nearly ten years and is in power in the harem.