Red at the funeral

I've been watching a Chinese Web drama (老九门 "The Mystic Nine"). There must be countless places where an important piece of information, something that would be obvious to a Chinese viewer, goes right over my head. I think this is one of them: a character wears red at a funeral. I knew that white was the colour for mourning, so it struck me as a little odd, but I've only just found out (from Wikipedia) that red is a celebratory colour which is forbidden at funerals. So the character's outfit is actually huge deal.

( SPOILERS for The Mystic Nine )