Trapped in the Enemy Camp, Design Katyusha to Support the War of Resistance!

Jiang Nan accidentally traveled to the Anti-Japanese War and became a prisoner of the Japanese at the beginning. Faced with the Japanese who wanted to persuade him to surrender. Jiangnan, who was about to pull two backers, accidentally bound the most powerful military system. In the system virtual laboratory, weapons can be designed. System skills directly hit people's hearts, allowing traitors to be used at my disposal, sending weapon blueprints to support the war of resistance. One weapon after another appeared. 56 And a half crushed the 38 big cover. Automatic, assault rifles emerged. Katyusha rocket launcher flies to Lu battlefield. Howitzers and tanks are no longer shortcomings. That day, the Japanese finally realized that something was wrong and put Jiang Nan on the execution ground, preparing to be shot. That day, the army came and the Japanese were defeated. On that day, Jiangnan returned in triumph. ... The introduction is too weak, please move to the main text... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.