I Just Want to Immerse Myself in Mending My Nails, but I Am Forced to Control the World's Wars

One hundred and twenty years after the founding of Daqian, Heishui City in the north was short of food and weapons. The garrison soldiers, wearing rotten armor that could be seen through with an arrow, fought for their lives with Di Rong. Shen Yan traveled through time and became a hereditary craftsman family at the bottom of the ordnance camp. He could not take the imperial examination, could not leave his country, and was not even worthy of leaving his name on the roster after his death. Placed in front of him were thirty pieces of broken armor and a seven-day deadline: if he couldn't repair it well, his hands would be broken in public. Shen Yan has no system, no magic weapon descended from the sky, only the knowledge of metallurgy and ancient weapon restoration accumulated in his previous life. He started by repairing broken armor and improving arrow clusters. In the desperate situation of lack of iron, lack of charcoal, and lack of craftsmen, he gradually created three consecutive crossbows, water-powered forging hammers, bed crossbows, and fortification guards. But the better the armor is repaired, the deeper the hole of the Ordnance Department's empty pay will be exposed; the greater the military exploits, the more absurd the shackles of low status that weigh on the head of the craftsmen will appear. From the craftsman's wooden sign to the team leader's waist sign, from the captain's armor to the general's seal, and finally to the big seal of the Director-General of Ordnance. Shen Yan initially just wanted to survive this winter, but later he wanted to fill the warehouses of Heishui City with grain and meat, make all the soldiers on the border have armor, and let the people of the world re-recognize the word "craftsman" that was stepped into the mud-the direction of the soldiers, the rise and fall of the dynasty, all started with this hammer.