Visitors walk through an underground tunnel during a tour at the Jiao Zhuang Hu Tunnel Warfare Site in Beijing's Shunyi district on Aug 19, 2015. The hidden tunnel network was used during World War II by Chinese Communist troops and peasant guerrillas to fight the Japanese army. This year marks the 70th anniversary of the victory in the Chinese People's War of Resistance against Japanese Aggression. [Photo/IC] |