Apocalypse: Get Stronger by Eating Iron? First, I’ll Stockpile a Million Tons

[Shelter + No System + Building a Faction + Decisive and Ruthless + Clever Protagonist + Sound Values + Logical Plot]

The apocalypse arrives. Zombies run rampant, and mutant beasts wreak havoc. Humans awaken special abilities that let them fuse with steel and grow stronger, but Zhang Jin is betrayed by the woman he loves and reborn before the apocalypse.

“If heaven has given me another chance at life, and cast me into this raging tide of an apocalypse, how can I live an ordinary life?”

This time, Zhang Jin builds a shelter, gathers survivors, and adopts the future guardian beast of the nation, Huahua the giant panda. He goes on to establish the world's greatest human federation.

Who rules the apocalypse? Wherever my blade points, I am king!