2. It's fake. During sleep, various stimuli inside and outside the body or external stimuli left in the brain cause situational activities, but after people enter sleep, the brain is still in an excited state, resulting in a picture composed of brain stimuli. It is said that "thinking during the day and dreaming at night" is right, dreaming and dreaming. Duke Zhou just made a rough guess according to this statement, and most of them were not established. Don't believe the outrageous statement.