Traditional Culture Encyclopedia - Hotel reservation - What did the ancient directional arrow look like and what was its main function?

What did the ancient directional arrow look like and what was its main function?

1. Also called the command flag. In the old days, the small flag used by the army to issue orders was called "the whole festival of clever reunion" by Li Yu of the Qing Dynasty: "At the end of the day, when the command arrow is held, a small arrow sounds like lightning, and the mountains and valleys turn into vicissitudes, and things change suddenly."