A construction worker transmigrates to the Yan-Yun frontier, where he starts out with a lone fortress destined to fall and a force made up entirely of the old, the weak, and the wounded.
Everyone tells him to run.
He says, “Wait. Let me draw up a blueprint first.”
Later, a million enemy troops besiege the city he built for three months, only to break every tooth trying to chew through it.
The crossbow he improves can pick off an enemy general from eight hundred paces away.
The standards he establishes become the model for the entire dynasty.
The emperor asks him, “What reward do you want?”
He says, “I want to repair every road in our country.”
This is the story of a “construction maniac” in ancient times.
