Civil engineer Zhang Ping'an became a military household in Peking when he opened his eyes. While others traveled through time and played tricks, he directly opened cement factories, built fortresses, and laid railways. Are the supervisors deducting food and pay? It took three days to build the road and it was a slap in the face. The Beiyuan cavalry is coming? Build a city overnight to block you. Zhu Di said he wanted to rebel, so he patted his chest: Leave Peking to me, and I promise to build an iron barrel! From the military household to the prince, let's see how the infrastructure maniac used cement and steel bars to build a steel frame for the Ming Dynasty!
