In the last seven days, Chu Yun became a popular person in the garage, able to fix any engine with his bare hands. Dr. Shen teaches first aid at community lectures and always can't help but look at his audience's ankles. Su Evening Qing checked her daughter's body ten times a day until the child hid all the mirrors.
Early in the morning of the seventh day, her daughter sets out seven origami boats at the breakfast table. The milk suddenly clumps and the words "Goodbye Mom" float out. The electronic watch sounds an alarm, and everyone looks out the window at the same time - the Yangtze River is flowing backwards.
The river washes ashore wrapped in the remains of machinery from seven years ago, and rusty crocodiles reorganize under the sunlight. Chu Yun sprays acid from a modified fire truck, but it causes the mechanical beast's surface to recede from rust to reveal new armor. Dr. Shen discovers that the community residents' birthmarks are re-glowing like countless miniature lighthouses.
Su Wanqing rushes to the kindergarten with her daughter in her arms, where a transparent shield is rising. Dr. Lin's voice came out from the broadcast tower, "Thank you for perfecting the system." Her daughter suddenly broke free and ran towards the swarm of machinery outside the shield.
The instant Su Wanqing was about to touch her daughter, space and time suddenly stood still. A shadow from the future flashed by, and the sword blade cut through the chip core of the mechanical crocodile." Take her to the river beach!" The silhouette left behind these words and dissipated.
The three of them rushed to the river beach with the whole community of babies, and all the electronic ripples gathered into pillars of light. Chu Yun inserted the severed arm shoots into the riverbank, and the plants grew wildly into sky-high metal trees. Dr. Shen cuts open his old wound with a scalpel, releasing seven years of stored radioactive blood.
As the mechanical beasts pounce in front of them, a giant bronze bell rises from the bottom of the river. The daughter reaches out and rings the bronze bell, and the sound wave shakes all the mechanical bodies into powder. Su Wanqing saw the names of all the newborns engraved inside the bell, including Lu Li.
After the smoke clears, the Yangtze River returns to calm. Dr. Shen discovers a metal flower blooming on Chu Yun's broken arm, and Su Wanqing touches her daughter's schoolbag to find the future battle armor design. The radio suddenly played automatically, "The winner of the first game has been born, the second game player Lu Li is ready to enter."