Rebirth in the Apocalypse: I Build a Mobile Fortress on the Sea!

Natural disasters, alien species, radiation, eternal night... In the desperate apocalypse, human beings are struggling to survive. In his previous life, because of his soft heart and gullibility, engineer Li Xiao's shelter was breached, his relatives and friends died tragically, and he himself was nailed to death on the ruins. Relive your life and go back to two months before the apocalypse! Li Xiao swears that all enemies will demand payment with your blood! The most important thing is that he has a blueprint for the [Ultimate Mechanical Ark] in his mind! At the beginning, you pawn all your property, take out high-value loans, tap into the black market, rent large dilapidated cargo ships at low prices, and hoard materials like crazy! Hire professionals at a high price to help quickly transform primary cargo ships! [Old old large cargo ship] → [Basic powered armored boat] → [Multifunctional Mobile Fortress] → [Powered Flying Ark] → [Void-class Star Destroyer Ark]! In this life, Li Xiao's heart is as solid as stone, and he is decisive in killing. Anyone who stops him from upgrading the Ark and seeking revenge will be crushed to pieces! Use steel and gunfire to carve a path to the sky in the last days! I am a moving natural disaster!