So, what makes Zheng-He so kickass? Here's the skinny. First off, he helped the Zongle Emperor usurp the Ming throne and in the process earned a place at the emperor's side as one of the emperor's favorites; no small feat, particularly since he was a Hui Chinese Muslim, not exactly a majority, that the Ming were trying to "integrate" through forced marriage into "proper" Han Chinese families. How did Zheng He keep from being "integrated?" He became a eunuch. Yup. That's right. When faced with the prospect of getting "integrated" out of his people and religion, Zheng He said "fuck it, I didn't need these testicles anyway*." Kind of a badass way to solve that problem. According to the logic of the time, eunuchs earned sorcerous powers in their emasculation, so maybe there was some up side.
*Eunuchs of this particular time period in China did not merely have their testicles removed, but also their penises. The exact process was crazy-demanding and required cauterization-hot implements and urethra-clearing tubes so that the healing process didn't scar over important orifices needed to remove wastes. Still, lots of folks died during the eunicization process. So, not only did Zheng-He say "fuck it" to his balls, he also said "fuck it" to his penis, risked his life to blood loss and infection, and he probably had to spend his whole life pissing sitting down. Quite the sacrifice to make for his people and faith, sorcerous powers or not.