Three-Body Problem: Starting from Replacing Cheng Xin

In the 62nd year of the Deterrence Era, the second sword holder elected by mankind, accompanied by the rotating chairman of the PDC, walked into the core of the deterrence system. Here resides a silent and great guardian of civilization! At the same time, a soul named Chen Xin comes from across dimensions. He will announce to everyone that mankind should and must be grateful to Luo Ji for the more than 60 years of peace he has won, because in the future, there will be no peace at all, only desperate progress, progress, and progress!