《明史·列传·卷六十九》
国家建都在北方，供应依赖东南，商人都害怕地跑了，这远不是什么小事情。
国家建都于北，仰给东南，商贾惊散，大非细故。
The country is located in the north, and its supply depends on the southeast. If the merchants are afraid and run away, it is far from a small matter.