Is black and white impermanence a brother and sister or a brother?

Black and white impermanence, also known as impermanence. It is a pair of gods in the traditional culture of Han nationality, and it is also the most famous ghost difference. This Er Shen, with shackles and handcuffs, specializes in catching ghosts, helping to punish evil and promote good, and is often the Ministry of the underworld gods such as Yan Luowang, Huang Cheng and Dongyue Emperor.

In Han mythology, "white impermanence" is called "Sebian", with a slim figure and a fair face; Black impermanence is called "Fan has no salvation" (or there is no forgiveness, and a few people write without blame). It is short and fat, and its face is black. Called "short master" or "eight masters".

I think it's a colleague, man.