Who do you mean by filial piety?

Filial piety refers to immediate family members.

Filial piety refers to immediate family members, while collateral filial piety refers to other relatives. Parents are dead, and children must be in Dai Xiao; Couples don't have to go to Dai Xiao; When the wife dies, the husband is not necessarily Dai Xiao; The younger generation is dead, and the older generation is not Dai Xiao. When the elder dies, the younger generation will get Dai Xiao; Grandsons and nephews should wear mourning clothes.

Those who wear heavy filial piety must wear linen Ma Xie. Generally speaking, Dai Xiao only wears white striped clothes, or wears white gauze or black gauze with a piece of white cloth embedded on his toes. You can lose your hair in a few days. Dai will keep hair for 49 days, and some "hundred days", "anniversaries" and "three years" will be filial.

Scope of immediate family:

Immediate family members, that is, superior and subordinate relatives who have the same blood relationship with each other, such as parents' children, grandparents' grandchildren, grandparents' grandchildren and so on.

Spouse's sisters and their children are not immediate relatives, but should be in-laws. In-laws are relatives of marriage, but not the spouse. In-laws are divided into three types: spouses of blood relatives, spouses of blood relatives and spouses of blood relatives. A consanguineous spouse refers to the spouse of one's lineal blood relatives and collateral blood relatives. The blood relatives of spouses refer to the direct blood relatives and collateral blood relatives of spouses. The spouse of the spouse's blood relatives refers to the spouse of the spouse's direct blood relatives and collateral blood relatives, which is an indirect in-laws relationship.