Colour of the Loyalty (Hak bak jin cheung) (2005)

Triad boss Dragon (Eric Tsang) receives word from cop friend Sgt. Mi (Lam Suet) that he's a target for assassination. With his money lying in the wait and the powerful position to take over, Dragon doesn't take any chances and loads up with bodyguards not previously in his organization. The boys, amongst them Fat (Shawn Yue - Just One Look, Infernal Affairs II), have unknowingly been trained for this day under the watchful eye of Brother Chai