Silver joke

This is an old story. It is said that a man named Zhang San got three hundred and twenty pieces of silver, and he was afraid of being stolen, so he wanted to let it go. Finally, he thought of an idea, that is, buried in the ground, but afraid of being dug up by others, he wrote a note: there is no silver here. The next day, Wang Er next door saw it and thought: He said there is no money here, so there should be. So he dug up the soil and it turned out to be real silver. He wants to take it away, but he is afraid to take it away. Zhang San saw it, told others, put it on the wall and wrote another line: Wang Er next door didn't steal it. As a result, Zhang San came here and really had no money, so he told others. When others saw these two lines written on the wall, they thought that Wang Er must have stolen them, so they went to Wang Er's house and found them there. So the next sentence is: Wang Er next door didn't steal it. The meaning of the whole story is shattered glass, self-defeating.