卢沟桥 Lúgōu Qiáo Marco Polo Bridge Origin Definitions Defs Strokes Stroke Words Sentences Sents 卢沟桥事变 Lúgōu Qiáo Shìbiàn Marco Polo Bridge Incident The Marco Polo Bridge Incident of July 7, 1937, regarded as the beginning of the Second Sino-Japanese War.