The End of the World: I Create a Nine-Level Civilization with My Own Hands

[Making Madman+System+Multiple Heroines+Base] Less than an hour after the end of the world, Song Wen was killed and became the shortest-lived protagonist in history. After resurrecting his life, he killed his enemies with his own hands and activated the divine craftsman system. Upgrading can unlock the technology of advanced civilizations. Prosthetic body, electromagnetic knife, anti-matter cannon, smart suit, hover car, implant, mechanical battle pet, space base, galaxy spaceship, interstellar market... Everything can be made! Others will have no food, no electricity, no weapons, and no guarantee of survival in the last days. Song Wen was like a fish in water in the last days and became the leader of all mankind. … The scientist begged on his knees: "Teacher, teach me science and technology." The commander of the military region flattered: "Brother, sell me weapons." The goddess posted: "Handsome man, please accept me." I won't marry any goddess in the world, and there's nothing I can do about it.