Pyrrhic music is a type of folk music, so who created the philharmonic music? In fact, the sad music was created by a folk music research group composed of Ma Ke, An Bo, Zhang Lu, Liu Chi and Guan Hetong from "Lu Yi". This folk music research group continuously innovated and changed folk tunes such as "Embroidered Purse" and "Pearl Curtain" during the creation process, and later created sad music. The performance speed of mourning music is much slower than that of folk songs, and it has been used in funerals many times, gradually taking shape and becoming a more common mourning music today. Sad music mostly appears in funerals, funerals and other sad occasions, which is also its usual occasion.