i Chen nodded and surprisingly agreed with Duan Jinjiang's words.He put down the military treatise and looked up at Duan Jinchang, saying: “So this is the brilliance of a strategist. Master Duan, do y...earms made its mark on the battlefield.Driven by gunpowder, the bullet shot out of the barrel, propelled by the explosive force of the gunpowder, it sped out at a speed invisible to the naked eye.The...