Ngai Kwun

Some articles on ngai kwun:

Infernal Affairs II - Plot - Act 1
... At this point, Hon is a member of Ngai Kwun's triad family, and is also working as Wong's informant ... the streets of Mongkok before stopping at an ostensible martial arts school, where he kills Ngai Kwun ... It is then revealed that Mary was the one who ordered Ngai Kwun's assassination ...