December 13th marks the anniversary of the Nanking Massacre. The massacre was perpetrated by Japanese forces in 1937 and lasted over six weeks. An estimated 300,000 Chinese civilians were killed, along with 40,000 Chinese soldiers. This historical event remains one of the most contentious issues between China and Japan and continues to impede reconciliation and partnership between the countries. Its anniversary can often be a time of mourning and anger in China, and frustration over Japan’s perceived reticence to ask forgiveness.