The Edzina lu was under the jurisdiction of Gansu province in Yuan dynasty. Its geographic location and climatic condition were very special. Its inside oasis areas were suitable for farming and animal husbandry. To garrison militia labors or soldiers and make them engage in farming was the particular productive measure in agriculture at the Edzina lu. Besides, the place was located in northwestern for its military defense purpose. The Edzina city was also the central point of Gansu Narin dao where was the origin of traffic network towards outside especially. In short, we can see how the Edzina lu played and effected its distributions from its farming measure and courier station in Yuan dynasty.