An exhibition about invading Japanese troops in China during the Second World War opens at the Jianchuan Museum Custer in Southwest China’s Sichuan province, July 7, 2015. The exhibition includes 1800 military helmets of Japanese troops. The July 7 Incident in 1937 marked the beginning of China's War of Resistance Against Japanese Aggression, which lasted eight years. (Photo: China News Service/Zhang Lang)
