Marco Polo Bridge
At around 04:00 (20:00 UTC), reinforcements of both sides began to arrive. The Chinese also rushed an extra division of troops to the area. About an hour or so later the Chinese Army opened fire on the Japanese Army and attacked them at Marco Polo Bridge (210 meters [690 ft] west-southwest of Wanping), as well as at a modern railway bridge (334 meters [1,095 ft] north of Marco Polo Bridge).