“how many wars have they won in the last five centuries?”
A perhaps more relevant question is: “how many real wars have they fought in the last 7 decades?”
The answer is: zero. And they don’t much participate in coalition wars or “police actions” like Western countries either. Which means there probably isn’t a living combat veteran in the entire Chinese army.
They invaded north Vietnam a while back, and they are constantly skirmishing with India. There should be living veterans of that, although a minuscule percentage of the Chinese population.