The sentence "Sunset and Lonely Qi Fei, Autumn waters and sky are the same color" is in sharp contrast. Sunset is gorgeous, multiple, solitary and simple, sunset is top-down, solitary is bottom-up, autumn water is sky, and Tianshui is the same, integrated, far and near, up and down, three-dimensional.

In addition, the combination of static and dynamic. The descriptions of Sunset, Solitude, Autumn Water and Sky give people a beautiful picture of "Chu Qing River". In other words, there is right, right is right. "Sunset" and "loneliness" are right, "autumn water" and "sky" are right, and together they are opposites. The author's carefree feeling of climbing the mountain is not directly vented, but embedded in the scenery, making the whole sentence meaningful and memorable, thus becoming a swan song of the ages.