Laozi's musical aesthetic thought is "Great Sound and Sound", that is, the largest and most beautiful sound is the silent sound.

Zhuangzi started from the idea of ??advocating nature and believed that the essence of musical beauty is reflected in human natural temperament. The criterion of musical beauty is that it is natural and not artificial, with a simple sense of beauty. Music breaks away from the shackles of etiquette and is in line with nature and human nature. Zhuangzi believes that there are three types of sounds: "human sounds" (man-made music), "earth sounds" (the sound of wind and grass), and "natural sounds" (completely natural sounds). This kind of music "cannot hear its sound, turn a blind eye to it" Shape, filling the heaven and earth, covering the six poles. "