What do you say when you see many people putting small mirrors on the windows?

Putting a small mirror on the window is used to ward off evil spirits. These superstitious things can't fundamentally solve the problem (for believers, it may be a starting point for psychological comfort). I have heard from the doctor that children with cranial nerve hypoplasia are prone to the above situation and love to talk in their sleep. It is a normal stage of development for children to get better when they are older. It is recommended to take the child to the hospital to consult a doctor and check a trace element to see if it is calcium deficiency. If all the indicators are good, there should be no problem.