《汉书·传·赵充国辛庆忌传》
一旦冰冻消解就可以运木而下，修缮驿站，疏通沟渠，整治湟陋以西道路上的桥梁七十座，使其可以通到鲜水附近。
冰解漕下，缮乡亭，浚沟渠，治湟狭以西道桥七十所，令可至鲜水左右。
Once the frost and snow have melted, we will be able to transport the wood downstream, repair the relay stations, dredge the canals, and construct bridges on the roads to the west of the Huanglou Ravine to reach the area near Xian Shui.