Cover Ears While Stealing a Bell-掩耳盗铃（yǎn ěr dào líng）
During the Spring and Autumn Period, a thief decided to steal a beautiful bronze bell from a family. However, the bell was too big and heavy to move. So he devised a plan to break the bell into smaller pieces and carry them home separately. But he knew that once he did, the bell would attract attention.
He thought and thought, and finally he had an idea. First he covered his ears and then he went to steal the bell. But he was spotted and caught on the spot.
After that, people used the idiom “cover your ears and steal the bell” to describe the foolish behaviour of deceiving oneself and others.
This story tells us that deceiving oneself and others is rarely successful, and it is wise to face reality and be honest.