In Chinese folklore, the (黑白无常) are psychopomps—beings that escort the spirits of the dead to the underworld (Diyu) to face judgment. The Unparalleled Black & White (2015) - aniSearch.com
The name is also the title of a popular Chinese animated series (donghua) based on a manhua of the same name. 1. The Mythological Origins: Guardians of the Dead Heibai Wushang