From reading on Chinese Humvee clones a while ago I believe that they don't use them as directly as the US does. Rather they see them in their original intended role - a logistic vehicle -rather than an armoured car for combat usage. You do see them with gunners, however as I understand it they have other vehicles in service for patrols / combat, etc.
However, there's not much in the way of Chinese vehicles in 1/50th, so a Humvee may have to do.