From the September 18th Incident to the victory of War of Resistance Against Japan, China and Japan not only fight on the battlefield but also on the secret spying field.

• 自“九一八事变”至抗战胜利，中日双方除了在正面战场和游击战场鏖战，还在隐秘的谍报战场展开了殊死搏杀。