Traditional spy games involve stealing intelligence, but the protagonist directly "steals" the enemy's industrial design and tactical logic. He opened a machine shop in the concession, and on the surface he took over the job of repairing cars. Behind the scenes, he collected fragments of crashed Japanese planes and damaged tanks from the black market. He used the deduction system in his mind to analyze and derive weapon blueprints and tactical suggestions for defeating the enemy. He is not only a spy, but also an entire arsenal hidden behind enemy lines.
