Anti-Japanese War: Show Swords, Burn Fire Sticks to Italian Cannons

(Resistance) + (Bright Sword) + (Time Travel) He traveled through time and became a cook named Feng Yan, but he was about to be shot by Li Yunlong at the beginning! There is no system, no gods, the only golden finger is his mind as a modern senior engineer! Facing the furious Li Yunlong, he calmly analyzed: "Captain, give me three days, and I will use physics to help you save half of the firewood!" Facing the misfired grenade, he used his chemical knowledge to purify the gunpowder: "Captain, times have changed. This is called the art of explosion!" Facing Yamamoto's special agent team, he used engineering to set up a decisive situation: "Captain, this is not called war, this is called applied mechanics!" From renovating stoves to making steel and making guns; from dismantling artillery shells by hand to establishing the Eighth Route Army's own military industry system! Feng Yan used knowledge that transcended the times to ignite a prairie fire of industry in this war-torn land.