Origin

This character combines a component meaning "to hang down" or "droop" on the left with a radical on the right that classifies words related to places or territory. The left side most likely evokes the idea of something hanging or suspended — possibly referring to how mail or messages were conveyed or stored at relay stations. The right side marks this as a place word. Together, the character came to mean a station where mail was exchanged or where travelers stopped, and eventually the mail system itself. The exact visual connection may have faded over time as the character's form evolved, but the combination of "hanging/transmission" with "place" captures the essence of a postal relay point.