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Tang Sichen traveled through the Anti-Japanese War and became a small spy at the lowest level of the military command. He infiltrated into the Japanese army and replaced an officer in the Fourth Division. The Fourth Division is famous, fighting hard and grinding, and ranking first in business! Tang Sichen used the platform of the Fourth Division to frantically resell Japanese intelligence materials: "Come and take a look, come and take a look, the Type 92 infantry gun is sold cheaply." "You want the code book for our war zone? Yes, do you want a copy of the code books for other war zones? "You want the general's sword? No problem, do you want Okamura Neji's Shogun Sword or Terauchi Juichi's Shogun Sword? " "You want to buy a bigger boat? Okay, do you want the Yamato or the Kaga? " … Seeing the overwhelming power of the Chinese army, the top Japanese leaders were collectively confused: Nani, have we invaded the great powers?