Sam Mo next door once stole it. What do you mean?

A man named Zhang San buried three hundred and twenty sycees, but he was afraid that others would steal them, so he left a note there, saying: There is no silver here.

Li Si across the hall saw it and stole the money while Zhang San was away. Li Si was afraid that Zhang San would doubt himself, so he left a note saying: Li Si didn't steal across the hall.

There is no silver here, 32, which is often used to describe those who have done something, but everyone knows it clearly, but he thinks that he has done it carefully.