Anti-Japanese War: Repairing Guns at the Beginning, Lao Li Begged Me to Build Cannons

[Anti-Japanese War + Bright Sword Fandom + No System + Farming] In 1940, supplies were scarce in northwestern Shanxi, bullets had to be reloaded, and gun barrels were ground flat. Jiang Yuan came to this war-torn wasteland with modern military blueprints. Others fight with all their might, but Jiang Yuan fights with his hands! A broken file → repaired and scrapped. Made in Hanyang, accuracy x100%! The saltpeter soil in the dry toilet at the east end of the village → Purified black powder, the power of grenades is increased tenfold! Wasted Japanese railway tracks → Build local lathes and start the era of mechanization of military industry! Empty gasoline barrel + thick steel pipe → Heartless cannon + super-caliber grenade, firepower increased a hundred times! Chu Yunfei looked at the independent regiment, all equipped with semi-automatic rifles, and his views were shattered. The special agent team that Yamamoto Kazuki is proud of is like paper in front of the directional mine! Jiang Yuan stood next to the hydraulic forging hammer and looked at the roaring underground arsenal. "My goal is not to be a general, but to stop my brothers from using their flesh and blood to block bullets!" "As long as there is scrap metal, I can create a torrent of steel for you!"