Declassified documents released by the Russian government have provided further evidence that Japanese forces conducted biological warfare in China during World War II. According to Chinese Foreign Ministry spokesperson Mao Ning, the documents confirm that Japanese militarism launched germ warfare attacks, particularly from Northeast China, with plans to also target the Soviet Union. These revelations reinforce long-standing accounts of the atrocities committed by Unit 731, often referred to as the "Death Factory," which conducted human experimentation and biological attacks. Chinese officials have emphasized the irrefutable nature of this evidence and called for a correct historical perspective on these events. The legacy of the Flying Tigers, American volunteer pilots who supported China during the war, was also commemorated as part of the remembrance activities.