"The Immortal in the Stone": Miner Shi Sheng picked up a strange stone that generates heat in a mine. After wearing it for three months, he was able to crush the huge stone. He practiced according to the lines on the stone, and his skin gradually turned blue-grey. One time, he was thrown into a deep pool by his enemies, and he discovered that he could hold his breath underwater for a hundred days, and the stone heart rang in his chest.
