There is no money in this place.

This is an idiom. Metaphor tried to hide things, but the result was exposed.

Folklore: Someone buried silver in the ground and wrote on the ground: "There is no silver here for 320". Wang er next door stole the money and wrote, "Wang er next door didn't steal it."

Once upon a time, there was a man named Zhang San who liked to be clever. He is very happy that he has accumulated three hundred and twenty pieces of silver, but he is also worried that so much money will be stolen by others and he doesn't know where it is safely stored.

Carrying it with you is inconvenient and easy to be noticed by thieves; Put it in the drawer. I don't think it's appropriate. It's easy for people to sneak away. It's not convenient to put it anywhere anyway. Holding the silver, he thought hard for a long time, thought about it, and finally came up with a method he thought was the best. Zhang San took advantage of the night to dig a hole under the corner of his house and quietly buried the silver. After the burial, he was still worried, for fear that others might suspect that the silver was buried here.

He thought about it again and finally came up with another way. He went back to the house and wrote seven big characters on a piece of white paper: "There is no silver here, 320". Then, go out and stick it on the wall beside the pit. He felt safe and went back to his room to sleep. Zhang Sanyi's fidgeting all day has long been noticed by neighbor Wang Er, and he was very surprised to hear the sound of digging a hole outside the house at night.

Just when Zhang San went back to his room to sleep, Wang Er went to the back of the house. By moonlight, he saw a piece of paper stuck in the corner, which read "There is no silver here for 320" in seven big letters. Wang Er understood everything. He dug out the silver carefully before filling the hole. When Wang Er came home and saw the glistening silver in front of him, he was very happy, but he was afraid. He thought, what if Zhang San finds the money lost tomorrow and suspects it's me? Then, he also had a brainwave, smartly picked up a pen, wrote the seven characters "Wang Er next door never steals" on the paper, and posted them on the corner of the pit.

[Note]: Later, according to this folk story, people used the phrase "There is no silver here for three hundred and twenty, and Wang Er next door never stole it" as an idiom to describe being smart and trying to cover up what he did, but the result was even more obvious. This idiom is simplified to "There is no silver here for 320". "There is no silver here, three hundred and twenty" originally meant that there is no silver here. Later, people used this idiom to describe what they wanted to hide, which was completely exposed because of stupidity.