On July 7th, 1937, a crucial access point to Beijing, Lugou Bridge, also known as Marco Polo Bridge, was attacked by Japanese troops.

1937年的7月7日，对马可波罗桥， 即北京卢沟桥而言，日本军队袭击成为至关重要的转折点。

The Lugon Bridge known in the West as Marco Polo Bridge which spans the Dongding River to the Southwest of Beijing is the oldest stone arch bridge extant in Beijing.

卢沟桥位于北京西南的永定河上，是北京现存最古老的一座石拱桥。