Why Is This Parallel Earth so Familiar?

In this parallel earth, the time of Mandela's death is actually exactly the same as in the memories of many people in the previous world. Many plots in cartoons only exist in the memories of people in the previous world. They obviously did not exist in the previous world, but they do exist in this parallel earth. See how Yang Sheng solves the puzzle, finds the mastermind behind it, and breaks the mystery that has been played around with applause... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.