My Best Friend and I Were Experts During the Anti-Japanese War

When my best friend in materials science created the first furnace of steel in the border area, I was using psychology to interrogate Japanese agents. The laboratory exploded, and my best friend and I both traveled through 1937. She became a doctor of materials science living in Nanjing. She used chemical formulas to make explosives and physical principles to modify firearms. She was revered as a "technical bodhisattva" by the base area. I became a doctor of psychology lurking in Shanghai. I used micro-expressions to break spy networks and used behavioral analysis to instigate traitors. I was a "mind-reading nightingale" that was feared and relied upon by the military commanders. One of us was making steel using local methods in a cave in Yan'an, and the other was circling the enemy's camp in a Shanghai dance hall. When she submitted "Alternative Plan for Border Area Materials", I was writing "Eighteen Strategies to Counter Interrogation". When she built "tung oil steel" to support the front line, I was using the prisoner's dilemma to alienate the Japanese and puppet senior officials. Until one day The secret message I intercepted mentioned a "mysterious incendiary bomb", and the technical parameters were actually data from her master's thesis. The anonymous intelligence she received was labeled "psychological warfare warning," and it was my habit to analyze handwriting. Only then did we realize that in this airborne battle, each other was the strongest trump card.