Legend has it that during the list of gods, none of the three demons Su Daji was included in the list of gods. After Jiang Ziya beheaded Su Daji with an immortal flying knife, her soul was gone. Her bones were thrown to the Hopeless Valley where she would never be able to escape. I don't know how many years later, one day a woodcutter was collecting firewood on the mountain. After getting lost, he picked up a luminous stone in the valley and took it home. The stone passed around several times and finally came into the hands of a poor painter. The painter thought the stone was very special, so he ground it into powder and put it into paintings. It turned out to be very easy to sell.