What does the word "behavior" mean? Where did it come from?

Look up Xinhua Dictionary, Modern Chinese Dictionary, Cihai, Ciyuan and Ancient Chinese Dictionary. The word post always has only one meaning: in the old days, people who sent official documents rested to change horses, and also referred to the horses and chariots used to send official documents. Phrases include post office staff, post road, post horse, post office, postal courier, post office, postman, etc. , but there is no such awkward "post action" ~ ~ `` It can be seen that "post" is just a proper noun in a narrow sense.