A new movie, produced by Peter Chan and directed by Ti Dung Sing, will feature Andy Lau and Louis Koo as bad guys against Daniel Wu. The new movie is called "Chai Gai" (Stepping the Line) and will center around drug trafficking. Andy will play a drug dealer while Louis will play a drug addict.

The movie has a budget of $20 million (HKD), but the filming date has not been set yet. To make his appearance more suitable for the role, Louis will have to lose weight to look more like a drug addict. His character is addicted to drugs and will even sacrifice his wife in order to obtain money to pay for drugs. Louis' wife will be played by mainland awardd winning actress, Cheung Ching Chor.

Allegedly Andy and Louis' roles are not the main characters; the main story will center around Daniel, who will play an undercover police officer. However "Stepping the Line" has potential in the international market, as Peter Chan's partner is Andre Morgan. Since the film offers opportunity to break into the international market, Andy and Louis accepted the roles. "Stepping the Line" will be filmed in Hong Kong and Thailand. Due to Louis and Andy's busy schedules, the filming date for the new movie has not been set yet.