What's wrong with taking off the hat of filial piety? What kind of custom is this?

Dai Xiao is a custom in China, which is usually used for funerals. People attending the funeral will wear mourning hats to show their respect and condolences to the dead.

At traditional funerals in China, filial sons and daughters will wear Dai Xiao hats, usually white hats with black gauze on top. Others will tie black gauze on their heads to show their condolences.

Mourning clothes are usually taken off after a funeral. After seeing relatives and friends off, people attending the funeral can take off their hats of filial piety to show their respect and farewell to the deceased.

Besides the Dai Xiao hat, there are many other traditional customs and ceremonies in China's funeral, such as burning paper money and horses. These customs and ceremonies are to express the memory and mourning for the dead.