Mourning, clothes worn in memory of the dead. In ancient China, plain clothes (plain clothes, Su Shang, Su Shu, etc. ) It has been used since the Zhou Dynasty, all of them are white, and there is a five-clothing system, that is, according to mourning, workmanship and cycle length, they are divided into Withering, Cui Zi, Meritorious, Xiaocheng, Hemp and so on. The top one is for heavy mourning. It is made of the thickest raw linen, and the edges are not sewn. Put it on your chest at the funeral; Women must also use a mourning bun (a bun is a mourning belt), commonly known as Pima Dai Xiao.