七七事变 qīqīshìbiàn Marco Polo Bridge Incident Origin Definitions Defs Strokes Stroke Words Sentences Sents 七七 qīqī July 7th July 7th, specifically referring to the Marco Polo Bridge Incident (1937) which marked the start of the Second Sino-Japanese War事变 事變 shìbiàn incident A sudden, major political or military event of historical significance; an emergency or exigency