How to study without waiting for the tortoise? What do you mean? Where did it come from? How to use it?

Turtle: In ancient times, yarrow and tortoise shell were used to predict good or bad luck. You can decide without divination. The metaphor is obvious and very clear.

The idiom comes from the Book of Changes, saying, "It's nothing more than a turtle exploring the hidden meaning, and the hook is deep and far, which will set the world good or bad."

Pronunciation is (bu 2 dai 4 shi 1 gui 1), which means that things obviously need no explanation.