My Doomsday Arms System

In an accident, Cai Wenjie returned to the last two days before the end of the world. The system that followed gave Cai Wenjie the hope of living in the end of the world.
There is no abilities, no fantasy, just a story of an ordinary person who has obtained the system struggling in the end times.
For himself, for his parents, Cai Wenjie vowed to end this apocalypse!