Bright Sword: I built Italian cannons for Li Yunlong

Zhou Zhen, a chemistry PhD who arrived in the world of "Bright Sword," didn't awaken god-level marksmanship or have a system, but he possessed invaluable knowledge from later generations. With winter approaching, Zhou Zhen casually improved cotton-padded clothing, doubling its warmth! Ammunition was scarce, and the misfire rate was extremely high? Zhou Zhen synthesized mercury fulminate, established a production line, and ammunition was plentiful! Japanese tanks were showing off their power? Anti-tank grenades taught them a lesson! Developing mortars was just the beginning; Italian artillery and recoilless rifles were the true path to victory! When the roar of the "Rainstorm" rocket launchers echoed throughout North China, the Japanese army cried out, "Why does the Eighth Route Army have Katyusha rockets?!" He was Li Yunlong's most trusted brother and trump card. He explained the future of warfare to Zhao Gang, and the two became close friends; he re-equipped Ding Wei and Kong Jie's troops, making the "Iron Triangle of Northwest Shanxi" incredibly strong; this was a unique path of resistance against Japan, a path of industrial salvation from "Made in the Border Region" to "Made in China."