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Jiang Chen crossed into the judgment day after the nuclear war, and there was a mess everywhere. In order to survive, Jiang Chen led the refugees to establish a base area and set up a federation. Then carry the judgment day's technology and return to the true world. Change the political structure of the earth, rescue the world in a critical moment, and establish the Great Union of Earth Federation! Expanding the territory and fighting the threat from the sky.
Using the Black Technology System, the protagonist enters a world of knowledge, where he improves his learning efficiency by a factor of one billion! He becomes the smartest human in existence, gets rich using his super brain... and experiences the loneliness of being a leader.