The Memorial Hall of the Victims of the Nanjing Massacre by Japanese Invaders exhibited 7,602 newly collected relics of the Japanese aggression on Monday morning.

The relics, collected from 14 countries, include photos, books and Japanese army munitions. They reveal the crimes of the Japanese army during the War of Resistance against Japanese Aggression (1937-45), such as the Nanjing Massacre, sexual violence and the use of poison gas, according to the memorial hall.

"In 2014, we sent workers to collect relics across the country and the world," said Zhu Chengshan, the curator. "In 2014, with many people's help, we collected the largest number of relics in a year."