When men and women fight using axes, there are some close up images of blades penetrating skin and blood spraying in slow motion.  In one scene a man is shot, with focus on blood spurts as the bullets impact him. There are also frequent choreographed scenes of Kung-Fu style violence.
References made to the smuggling of Opium do not glamorise drug misuse. There is a verbal reference to a man taking his own life in prison, with no strong detail.