Is Dai Xiao wearing filial piety?

White and black boxes are filial piety.

If you wear filial piety, the black box in white is filial piety, which is worn by children; If it's a grandchild, it's a red letter in a black box.

Filial piety refers to immediate family members and is the heaviest mourning. Generally, filial piety can only be worn after the death of immediate family members, while collateral relatives or other relatives generally wear side filial piety after the death.