Introduction to the chessboard stone: Half of the "chessboard stone" is suspended in the air and half is connected to the mountain. According to legend, there was a woodcutter by the Xuantian Lake. One day he went up the mountain to collect firewood and lost his way. He looked up and saw two old people with elegant expressions, sitting on rocks playing chess, so he went up to watch. When he watched the two old men finish a game of chess, he unexpectedly found that the handle of the ax he used to chop wood was rotten and the ax head was rusty. The woodcutter looked back again and saw two old men rising up in the clouds and turning into green smoke. Only then did the woodcutter realize that the people playing chess were two gods. One day in the immortal world is several years in the human world, so I don’t know how many years this game of chess has been played. According to old people, the woodcutter went into the mountains to collect firewood and was never seen again. Legend has it that he also turned into a god.