A man is lying on a mat with a woman. It's implied both are naked, but no nudity is shown.

A woman disrobes in front of a man and they have sex. Her bare buttocks are briefly visible.

There is a lot of martial arts fighting and a lot of people are beaten to death. There's little actual blood on display, though.

The main character is constantly smoking cigarettes.

The plot deals with opium dealing and sometimes we see processed opium being moved.

One character uses snuff tobacco from a porcelain bottle.

There's one scene where it is implied that the protagonists kill and cook a dog. That may be disturbing for some Western viewers.