Blue sky and yellow leaves. The autumn wind is full of waves, and the waves are cold and smoky. The mountain reflects the sun and the sky meets the water. The grass is ruthless, and the sunset is even more outside. Dark homesickness, thoughts of chasing travel. Every night unless, sweet dreams make people unable to sleep. The bright moon building is high and lonely. Wine becomes sorrow, acacia becomes tears. (Fan Zhongyan's Su Curtain Covering) This word depicts the vast and gorgeous autumn scenery with a deep and indirect brushwork, expresses the deep and lingering worries about leaving home and going to the countryside, and shows the poet's broad mind and love for nature and a better life. The grass is ruthless, and the sunset is even more outside. It is used to reflect the author's infinite nostalgia for his hometown, not really heartless.
The phrase "the grass is ruthless" has changed from the real scene in the eyes to the virtual scene in the heart, and the parting has been hidden. "Cao Fang" has always been one of the images that produced the theme of parting. For example, it is said that Cai Yong wrote "Green River Grass Philip Burkart Road" in "Drinking Horses in the Great Wall Cave"; Li Yu's "Qing Ping Le" wrote that "hate is like grass, and you can live farther and farther". Complaining about the ruthlessness of Cao Fang shows that the author is affectionate and righteous.