Ashes of Doom: Building a City of Steel

I am reborn, and in this life I want to stop the world from starving! In my last life, I died of hunger and betrayal, like a wild dog. In this life, I will be reborn with infinite space! When the end came, civilization was reduced to ashes, and everyone lived in fear and despair, I stood up. Food? My warehouse is stacked! Arms? My arsenal assembly line runs 24 hours a day! Safety? The steel city "Rock City" I designed myself is the strongest shield in the apocalypse! All those who take refuge in me will receive shelter and dignity; all those who are my enemies will become the cornerstone of my city! My name is Lei Cheng, a contractor who has climbed back from the brink of death. They call me a savior and a dictator, but I only know that in this collapsed world, what I created is the last order and hope for mankind!