Anti-Japanese War Military Industry: the Hand-Rubbed Bamboo Stick Array at the Beginning

The soul of a contemporary young man travels through a parallel world in 1937. Faced with an approaching enemy and a desperate situation, his choice is not to escape. Instead - do it! Tunnel battle? No! It is [a three-dimensional defense system created from scratch]! He accurately surveyed the geology and analyzed the soil structure → optimized the excavation efficiency, turning every inch of soil into a trap and putting the enemy in a desperate situation! Industrialization? No! It is [the road to industrial rise from scratch]! Start with a simple iron-smelting furnace → Forge earthen cannons, imitate the Sanba Daigai, and hit the enemy with weapons "made by the enemy"! While everyone was still resisting with their flesh and blood, he had led the villagers to rise quietly in the mountains! Old stone mill→Analysis of [Hydraulic Drive Principle]→High-efficiency mill, food production surges! Simple earthen furnace → synthesize [blast furnace steelmaking technology] → high-quality steel, the weapon performance will change! Enemy's remaining ammunition→Analysis of [Chemical Composition of Gunpowder]→High-efficiency explosives, flexible tactics! With every step he takes, he is upgrading the backward mountain village into an impregnable steel fortress! He wants to make this deep mountain a "death zone" that scares the enemy!