Gewu Opens Mountains and Rivers

In the battle of Canling Pass, 30,000 sabers were broken and the bones of 8,000 border troops were buried. When Shen Yan, a doctor of materials and applied chemistry, woke up, he was already on death row in the military prison and was to be executed in three days. Everyone said that the Shen family stole information to harm the army, but he was the only one to see the truth from the half-cut knife: this was not scrap metal, but a murder hidden in the fire. From cutting off the knife in death row, to rejuvenating the country through hundreds of efforts. He used the method of studying things to redefine the salt and iron, weapons, construction methods, and measurements, and recast the mountains and rivers of the old dynasty step by step.