Idiom of "Zi"

All idioms containing the word "Zi" and their explanations;

Turtles without waiting-waiting: waiting; Turtle: yarrow and tortoise shell, which were used by the ancients for divination. Before using yarrow tortoise shell for divination, good or bad luck has come out. It shows that the development is obvious.

Don't wait for turtles: in ancient times, you used yarrow and tortoise shell to predict good or bad luck. You can decide without divination. The metaphor is obvious and very clear.