What kinds of underclothing or overclothing did the chinese wear with their armor. I'm thinking primarily during the ming dynasty era, but I'd be happy to hear info from other eras too.

I think it must be Chinese silk. This material was strong by glucose fiber. The Mongol also wore this material behind their leather armour too

Do you have any image depicting exactly what were the pieces worn? I am referring to the warring states period or around Han dynasty.
Was it a 2 pieces outfit? What about the type of boots they were wearing?