Have you ever felt a sense of déjà vu when you see someone you've never met before or a place you've never been to? It seems like the person standing in front of you has been seen before somewhere; it seems like this place is very familiar. Any idea why this is? Because there is a "parallel world" in this world, and there is another you in the parallel world. He is also living, socializing, traveling, etc., But you have different life trajectories because of your different choices of things. When you fall asleep at the same time, due to the occasional short-circuit in the "parallel worlds", there will be a memory exchange between people in the two "parallel worlds", which is the so-called "dreaming". The memories in your brain in the "parallel world" will be transmitted to your brain in the form of pictures through "human body bioelectricity" and stored. Then, another place you have been and the people you have met will also be stored in your brain and become your memory.