《元史·列传·卷四十六》
其地多山水，但无五谷桑麻之利，得其人不能役使，得其地也无利可获。
其地多山水，无耕桑之利，得其人不可役，得其地不加富。
The land is rich in mountains and rivers, but there is no profit from grains, mulberries, or hemp. People there cannot serve the government, and there is no profit from the land.