Stone Skin:

After his father disappeared, Lin Yan discovered a strange "Tao Te Ching". Every comment in the book seems to point to one place - the Chengjiang Mining Area. There is an underground mine tunnel that has been sealed for decades. There are secrets that three generations of stone people have tried desperately to hide. There is also a stone that everyone is looking for but no one knows its true value. Lin Yan originally just wanted to find his missing father. But when he stepped into the clues left by his father, he discovered: In his eyes, the father who was a failure, stubborn, and ruined his family actually spent twenty years secretly guarding an unspeakable secret. What is hidden at the end of the underground mine tunnel? Why did the father choose to disappear? What truth is hidden in that thing called "Stone Skin"? A stone can determine the fate of three generations. A search allows a son to get to know his father again.