Doomsday Mecha, Starting from Building a Mechanical Army

[Bitter and weak flesh, mechanical ascension] + [Biochemical Punk] + [Apocalyptic Disaster] + [Explosive Troops] + [No Harem] The end of the world is coming, with super powers, raging zombies, biological mutations, and extreme natural disasters, all of which are constantly destroying the hope of mankind. As an ordinary robotics engineer without any cheats. Jiang Yi stood on the roof of the building and gently adjusted his glasses. The cold-shining metal blended perfectly with the flesh and blood of his arm. When the cold weapons of war are given the elegance of human flesh and blood, all the madness of the end of the world seems so pale and powerless. Under the setting sun in the distance, mutated creatures surged in like a tsunami. Jiang Yi's voice was cold, and there was no trace of fear in his dark eyes. "There's only one thing we have to do, and that's to survive."