It can thus be interpreted as such: The secret in the Dragon Slaying Saber can be used to "kill" (dethrone) the (Mongol) emperor and replace him with another (Han Chinese) ruler. Ideally, a brilliant military leader can use the "Book of Wumu" to its full potential by staging a rebellion to overthrow the Yuan dynasty and restore Han Chinese rule. However, if the new emperor turns out to be an incompetent monarch or a tyrant, a martial artist can master the skills from the manuals in the Heaven Reliant Sword, assassinate the emperor and replace him with a wise and benevolent ruler.