The Yuan Dynasty had a vast territory and developed postal transportation. In the Yuan Dynasty, the post station was called Jamuzi in Mongolian. "The person standing in red is also the translated name of the post." Station, jam in Chinese or vjam in Tibetan are transliteration of Mongolian jam (transliteration in Chinese classics is "dip"), which means "Hou" in Chinese. Therefore, in the literature of China in Yuan Dynasty, posthumous stories were also called post stations, which gave rise to the name of "post stations". The post office of the Yuan Dynasty can be traced back to the period of Genghis Khan, the founder of Mongolia. Before the ancestor Kublai Khan, Chagatai Khan had already repaired the post road from Shandan State, passed through Hexi Corridor and Uighur territory, and arrived in Hu Yasi near Arimuri, where he was stationed. Large-scale postal establishment began in Kublai Khan's period. In A.D. 1264, Kublai Khan moved the capital to Yanjing (now Beijing). In A.D. 127 1 year, Yanjing, its capital, was the founding name of Yuan. At the same time, under the management of Lu Ye Chu Cai, the "Standing Red Strips" was promulgated, and on this basis, the postal system of Mongolian Station Red and Han was unified; Adapt to the transfer of the ruling center and plan the postal system centered on the metropolis; Establish a horse delivery network with postal service as the main body and a step delivery network with express shops as the main body. As a result, a large-scale and dominant post office was formed in the Yuan Dynasty, which communicated the links between the central government and local governments. Post-transmission sites are dotted around, and orders are coming. In addition to welcoming envoys, providing accommodation and transportation, the post station in Yuan Dynasty was also used to transport a small amount of goods such as tributes and luggage in peacetime, and also undertook the transportation task of military supplies in wartime. The postal system also has stations at transportation hubs to transport precious and urgently needed materials such as gold and silver, treasures and tributes. Referring to the Song system, evacuation transportation can be divided into post network with horse delivery as the main body, and a set of express network with step delivery as the main body to deliver official documents.