The Triads is a gang in Grand Theft Auto IV that operate out of the Chinatown district in Algonquin, Liberty City. They are mostly involved with drug shipping.
The LCPD Database states that there are three different sets of the Triads. One group of Triads are under Hsin Jaoming and his son Chan Jaoming. Another is led by Wu "Kenny" Lee and his nephew Huang Lee. The third is controlled by Zhou Ming. The Jaoming Triad is said to supply the The Angels of Death and Korean Mob with narcotics.
At one point in time they even deal with The Lost Brotherhood, due to the Lost stole their heroin, which had already been stolen by the Angels of Death, only for it to be stolen back from the Lost by the Triads.
Huang Lee is the protagonist in Grand Theft Auto: Chinatown Wars.