"On the Sound of No Sorrow and Music". "The Wisdom Heart is Like an Orchid" comes from "The Theory of Sound without Sorrow and Music" written by Ji Kang during the Three Kingdoms period. "The instrument is not fake and wonderful, but it is good, and the instrument is not tuned by the wisdom of the heart." "The Theory of Sound without Sorrow and Music" not only discusses whether music has sadness or music Whether music can change customs also involves a series of major issues in music aesthetics, namely the ontology and essence of music, the relationship between sound and emotion in music appreciation, and the function of music.