He is a member of his father's set of the Triads, the Jaoming Family. Chan is one of three possible contenders (the other two being Wu Lee and Zhou Ming) to inherit his father's position. He is believed to be the underboss of the Jaoming Family and has a group of loyal supporters. Both him and Zhou were falsely accused of being the FIB informant who was ratting out the Triads (only for it to be revealed to be Kenny) and they were both killed by Huang Lee on Hsin's orders.
Chan has been arrested on three occasions: once in 1999 for possession of heroin, again in 2003 for extortion and 2005 for possession of stolen property. Chan is described as a playboy (he mentions having sex with twins and a transsexual prostitute), drug-addled, and too stupid to become his father's successor as the leader of the Jaoming Family. Chan is also oblivious to Huang's constant mocking and sarcastic remarks.
Melanie Mallard (Killed for attempting to broadcast Chan's operations on TV without blurring Huang's or Chan's faces) (PSP only)
Jaoming is not a real Chinese surname, and would be unlikely to exist since most Chinese surnames consist of only one character. Some two-character Chinese surnames existed in the era of The Romance of the Three Kingdoms (such as Au-Yeung [歐陽], Zhuge [诸葛] and Sima [司馬]) but are relatively rare in present-day China. However, Chan is a perfectly usable surname, in fact it is the fifth most common surname in all of China (although it is romanized as Chen when it is from a primarily Mandarin-speaking region), and the most common in Hong Kong and the surrounding Cantonese-speaking region, where Huang Lee and the other Liberty City Triads are from.
The name "Chan Jaoming" is a possible a reference to Yao Ming, a famous Chinese basketball player.