Modern theory holds that dreams are subconscious, and what the brain hasn't finished is what the cerebellum is doing, thinking and dreaming day and night. It may be something I met or thought of recently, it may be Zhang Guan Li Dai, or it may be body double; Perhaps it is a series of books, film and television works, and real-life storylines; Maybe it's a bad sleeping position, a certain part of the body is uncomfortable, and I had a dream related to it when I melted into similar items, which doesn't mean anything.