The memory of the Nanjing Massacre has been a point of contention in Sino-Japanese relations since the early 1970s. Trade between the two nations is worth over $200 billion annually. Despite this, many Chinese people still have a strong sense of mistrust and animosity toward Japan that originates from the memory of Japanese war crimes such as the Nanjing Massacre. This sense of mistrust is strengthened by the belief that Japan is unwilling to admit to and apologize for the atrocities.