You want to cover up your fault.

According to psychologist Freud, dreams are a true dialogue between a person and his or her heart, a process of learning from oneself, and another life that is closely related to oneself. Psychologically, dreaming about decoration generally means covering up and covering up, so dreaming about wallpapering means that you want to cover up your faults.

"The Interpretation of Dreams" is a psychological theoretical work written by the Austrian psychologist Sigmund Freud, also translated as "The Interpretation of Dreams".