Nature comes from Zhuangzi's theory of everything. Compared with the earth and people, nature is the highest realm of music. Teana: the sound from the cave. Refers to the sounds of wind, water and birds in nature: the sounds of nature are silent | the drums are loud, and the mountains lean against the moon.
Nature is the voice of nature, and this song should be heard only a few times between heaven and earth.
L: The sound from the cave. Refers to the sounds of wind, water and birds in nature: the sounds of nature are silent, the drums are deafening, and the mountains lean against the moon wheel.
Nature is the voice from the sky, and this song should only exist in the sky, and it is rarely heard on the earth.
There was a definition of "three tones" in ancient times. The sound of guqin is natural, the sound of the earth is the earth, and the sound of Kunqu opera is human.
Teana generally refers to the sounds of nature, wind, birds singing, spring water, and all kinds of sounds that condense the essence of heaven, earth, sun and moon: later generations say that poetry does not decorate and carve, and those who enjoy nature are teana.
The popular usage now is to describe a good voice.