Cheng was a martial artist trained in the arts of Iron Armour and Eagle Claw, allowing effective defensive and offensive capabilities. His Iron Amror technique alowed him to become totally invulnerable except for one pressure point, while his Eagle Claws could often tear apart living humans. In his early life he was suprassed by a fellow student, and as such was unable to pursue martial arts as a career. Cheng instead joined the Imperial Court, and became the minister of state.