The End of the World Is Coming, but the Scientific Research System Is Not Doing Its Job Properly?

[Double life + decisive killing + loyal dog boyfriend + contrast; non-systematic and refreshing article. In AD 3023, the Japanese country openly discharged nuclear sewage, causing animals and plants to mutate, seawater to pour in, and the earth to perish. As the dawn of the underground city, Li Ming, the only remaining human being on the earth, was attacked by the sea water that produced consciousness, and traveled back to a month before the mutation occurred. He turned around and signed a contract with the scientific research system, and handed over a design sketch and data of an early electromagnetic gun in the apocalypse, causing a nationwide sensation... Start stocking up with millions in rewards! Create a safe base! This time, she will do Dawn! Looking at the tasks issued by the system, my head is full of black lines, Li Ming: System, something is wrong with your mission...