The aim of this study is to illuminate the financial act of grain tribute 漕運 system and its relationship to the non-institutional factors such as physical distribution of the time. By establishing its political and military center in a location far from the principal sources of the land tax, the Ming dynasty was required to invest resources in establishing material supply lines and maintaining their stable operation. Given the high cost of such operations, the bulk goods such as grain could not continue to be sent to Beijing endlessly. In accordance with the increase in the number of the people involved, the amount of individual payments was naturally limited. One of the countermeasures chosen as most appropriate was the allotment of one da...