It can only be viewed as a science fiction movie, and cannot be explained by science. If it is really explained by parallel space, new branches can be generated. Comparing time to countless lines, the parallel space is the cylinder inside the line. If the story is fixed in a historical process, upstream, assuming that it can be changed, then the changed history will overlap and collapse. If there is one more choice, it will be like a river, a main channel, because of human changes, new branches will be formed, but the main channel has not changed. All that changes is the new branch generated. In terms of individuals who pass through, the people in the main river will disappear.
Because after the change, there is no wearing more without happening.
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