We're well aware that there's a drug-dealing component to GTA: Chinatown Wars, but the details on it have been a little lacking -- this post won't help much. MTV Multiplayer learned that players may want to sell drugs in Chinatown Wars because cash from missions won't dramatically increase in payout, unlike other GTA titles. Selling drugs is apparently one way to increase cash flow.
According to Rockstar, locations for deals are plentiful and won't detract from the action in the game. The drug economy is also affected by destruction of CCTV cameras. The more you break, the less valuable the drugs become (yes, less, it seems counter-intuitive). No word yet if Rockstar plans to have drug prices in the game reflect current standard market rates.