It is said that in ancient times, people would set up a wooden post on the main road to identify roads and signs. Later, postal kiosks and delivery rooms also used it as a sign. Its name is "ring wood" or "standard wood" In ancient times, Huan was similar to Hua, so it was slowly pronounced as Hua Biao.
As not only a road sign, but also a message to passers-by, huabiao appeared in the Yao and Shun era of primitive society.