Yang Fan, a young Chinese man, dressed as the captain of the Osaka Regiment during the Anti-Japanese War and watched the Japanese flag break through the defense on the spot! As a Chinese with good roots, he decisively started the "Being in Cao Ying and being in Han" mode - bribing his superiors with small yellow croakers, using business as a guise to send food, ammunition and information to the Eighth Route Army, and commanding the regiment to perform tricks to avoid war. The whole process was funny and the Japanese army was tricked into a trap. It can be called the most outrageous anti-Japanese undercover agent!