What did Duke Zhou mean when he dreamed that the tortoise bit his hand?

Dreaming of being bitten by a turtle: life will be happy and rich. Dreaming of a woman bitten by a turtle is your fortune: everything goes wrong. Be careful when there are little people. But don't be pessimistic, take a step back and wait for good luck. Widowed and lonely people dream of being bitten by a turtle, so they travel, but be careful on the road.