In the 37th year of the Wasteland Era, natural disasters swept across the world, radiation spread, and mutant creatures ran rampant. Yu Ting was hiding in a crumbling ruins. The shelter around him only had the last three days of rations left, and the entrance had been eroded by corrosive acid mist. He knew that he would either find a new living space or become the next mummy in the wasteland. Just as he was digging desperately, his fingertips touched a piece of cold metal - it was a building core from the old era, and it was covered with lost extreme structural drawings. Others saw this as a pile of scrap metal, but he understood what was hidden in it: how to build the strongest fortress in the wasteland with the least amount of materials in the shortest time. The news has spread, and refugees will soon come to grab this core. But he already has a plan in mind - he wants to turn this ruins that are about to collapse into an underground city that everyone can look up to. As for the mutated beast kings in the depths of the ruins who were ready to move, he planned to let them see what a true "iron wall" meant.
