Closed Loop of Space and Time: Humanity's Guide to Self-Rescue

Death, rebirth, seventy-two hours. Lin Feng thought this was the infinite hell he endured alone. Until he woke up for the Nth time, the whole world was completely turned upside down - the crowds on the streets no longer panicked, but expertly rushed to the shelter; the army's artillery fire had accurately covered the coordinates of the monster's arrival before he opened his mouth; the barrage was no longer a question, but countless shouts with desperate memories from all over the world: "Lin Feng! There is a sickle monster ambushing at the intersection of the East District!" "Be careful of the acid etchers! We must guard the reservoir this time!" "We all remember! Like you, we all died before!" He suddenly realized that every time he died and was reborn, he was dragging the consciousness of mankind around the world back to the starting point, imprinting all the tragic memories. The cycle of despair has evolved from the lonely struggle of one person to the torture shared by the entire civilization. They used the only currency of "memory" to iterate again and again, and won the first victory with difficulty. However, when the fog dissipated, what sounded from the sky was not cheers, but a cold civilization rating: [The first phase of stress testing is over. Rating: B+. Second phase test, start. Lin Feng looked up at the stars and finally understood. This is not a disaster, but a cruel "civilization screening experiment." And he, this abnormal variable that was placed in the test site, will lead all humans with "memories" to launch a galaxy-shaking reverse trial against the aloof observer!