In 1931, Japan invaded Northeast China. The following year, the League of Nations dispatched a probe to investigate. Nine Chinese patriots submitted over 400 pages of meticulously compiled evidence, preserved in a blue cloth bag inscribed with "TRUTH." In the global fight against fascism, China pulled the first trigger. CGTN's feature "The Main Eastern Battlefield: China in WWII" tells the story behind the beginning of the World Anti-Fascist War.