This Yang Kaicheng is a famous jewelry thief who is so cold-blooded and ruthless. After robbing wealth, he enjoys killing people. He likes to stab the rich man's face with the word "Five Rebellions", and even stabs him to the bone. The skull of the rotting corpse can be clearly engraved with the standard regular script character "Five Nis", so Yang Kaicheng was called the "Five Niss Thief". There are often other thieves who also carve the words "" on the victim's face, but an experienced gangster can distinguish the true from the false at a glance.