The post delivery in Zhou Dynasty laid the foundation for the development and perfection of post in coming generations. There were two kinds of delivery methods for the post delivery communications delivery by courier, and relay delivery by several persons, the former used in general situation while the latter used for border communication. To meet communication requirements, all states set up special delivery organization - post. Therefore the post has multiple functions of communication, reception and transportation. By then communication was mainly by carriage or riding.
China is one of the earliest countries to use cats.
In Zhou Dynasty, communication developed with wide-ranging ship and cat transportation. The delivery organization and its management of Zhou Dynasty had greatly affected the post after Qin and Han. In ancient times, the delivery person must have a tally, and riding time and number of the horses must be recorded.