Post System of Great Wall Photos

Based on the records on tortoise bones, Chinese post system can be traced back to the message delivering by horse of the Shang Dynasty (16th - 11th century BC). Later, some other message delivering ways were created along with the development and progress of the society, including beacon fire, wood slips, clay seal and so on. In ancient China, there was a posthouse at equal distances from one another for changing messengers and horses.