This saying has a long history in both the East and the West. For example, the "Preface to Mao's Poems" of the Han Dynasty said that "emotions are moved in the heart and shaped in words. When words are insufficient, we sigh, sigh. If there is not enough, then sing it, if the chant is not enough, then you don’t know how to dance with your hands or dance with your feet.” Since the late 19th century, the saying that art originated from "expression" has had a great influence in the Western literary and art circles. It can be said that the main theoretical basis of Western modernist literary and artistic thought is to emphasize that art should "express itself."