According to China History, on Jan 13,1937 Japan imperialism force attacked China capital Nanjing, they met resistance, but when they finally took the city, they started massacre for 6 weeks, 250,000-300,00 Chinese citizen and surrendered Soldiers were killed,20000 Women were raped  by Japanese Imperial Force. History can't be forgotten, even we do not want to always foul the past, but when we common Chinese people saw many Japanese politicians still go to  Yasukuni Shrine to Worship the war criminals, now they still pocess Chinese Territory Diaoyu Island, they still have very heavy army even more powerful than China.we do not feel good.(I here attach 9 photos to show the world Japanese imperialism ruthless， these photos were taken by western People when Nanjing Fell down to Janpanese Imperialsm force then， some of these photo even taken by the Japanese Imperialism themselves)