John Rabe, 1882 was born in Hamburg, Germany, and joined the German Social Workers' Party, the predecessor of the Nazi Party, in the 1920s. He was a veteran of the Nazis and was once highly respected. He came to China in 1908, and even was expelled by the German government several times in 19 19, because after the outbreak of World War I, China also declared war on Germany, and his status as a business representative of Siemens was extremely embarrassing, so he was forced to return to China to rest. In the second year after being repatriated, Rabe returned to China as a senior consultant of a foreign-funded company in China until the China headquarters of Siemens Foreign Firm officially opened in Shanghai. During this period, he was closely monitored, and it was suspected that his repeated visits to China had other hidden purposes. It was not until the National Government took root in Nanjing and recognized Siemens' rights and interests in China that he bid farewell to the "blacklist" and stopped being a "special person".

Rabe has a very special relationship with most intelligence agencies and dignitaries. In addition to military personnel, he often contacted the dignitaries of the German military advisory group in Nanjing and sorge, the first spy in the Far East who was embedded in the Japanese army as a Nazi. The Japanese called him a Nazi spy in the history books.

It is these complicated identities and experiences that make Rabe's diary and a large number of protected Nanjing Massacre materials inexplicably questioned, and many written materials have not received higher attention. The reason is that the Japanese argued in the international court that "a Nazi's words are not convincing and should not be believed ...".