However, Zhaotong people, with tremendously strong stamina, cut and dug numerous post roads and horse roads leading to the outside areas among the high mountains and towering ridges or by the sheer precipices and overhanging rocks and they left thousands of traffic place-names of roads, bridges, ferries, passes, positions, etc.

With the advanced and open society as the background, Tubo stepped into the first independent "information spread times" and the basic mode could be classified as military, post, diplomatic, cultural and economic spread.

The post assistant s background of the Ming Dynasty was mean and their official rank was also low.

Traditional operas of Yuan-Dynasty has reported a variety of circumstances such as Yuan dynasty postal post kinds,organizational system,functions and lives of post officials.

The Post-roads Between Two Capital in Tang Dynasty——A True Tang Poetry Road;