With the support of a vast postal system,the Qing Empire constructed a vertical network of imperial power from the central to local levels.As a centralized state,it needed to overcome the difficulty of controlling distant areas,and thus maintained a tradition of collect...MORE With the support of a vast postal system,the Qing Empire constructed a vertical network of imperial power from the central to local levels.As a centralized state,it needed to overcome the difficulty of controlling distant areas,and thus maintained a tradition of collectin...