Some people think that dreams occur because the soul leaves the body and travels through time and space after falling asleep. Therefore, some people are surprised in reality to realize things or things they have seen or experienced in dreams.
Freud's theory of dreams: Dreams embody emotions buried deep in the subconscious, and the fragments of recalled dreams can help us reveal these hidden emotions.
——From Baidu Encyclopedia
Lin Ziyao: "..." Then do I travel from the past to the present, or do I travel from the present to the future =_=