Religious warrior cult, part of the Kwong Duck in San Francisco
The Ding Xiang are a religious cult of warrior monks who practice a special form of martial arts involving various sharp implements such as swords, axes, sickles and kukris.
The religion is quite secretive, but supposedly devoted to the worship of a demon of some sort. It is an open secret that the rituals involve consuming various hallucinogenic drugs, which makes their warriors impervious to pain and ignorant of their own mortality, allowing them to do significant damage before they can be physically stopped if they attack.
The Ding Xiang were recently absorbed into the Kwong Duck.