The War of Resistance Against Japanese Aggression during World War II was a scar that Chinese could not erase, in this war, Japan not only engaged in massacres, killed 300,000 people in China, but also used germ bombs to destroy humanity, recently a German city found a bomb left over from the Period of World War II, which caused quite a stir, and the international community has once again strengthened its attention to the bombs and germ bombs left over from these wars.

For Chinese, Japan's Unit 731 was a nightmare for Chinese, and it was also the best evidence of the Japanese army's use of chemical weapons, and at that time, in addition to the use of germ bombs by Unit 731, there was also a Unit 516 that also engaged in germ bombs, and also experimented and studied the effect of poison gas with prisoners of war and civilians. Later, the Japanese army was defeated, and I thought that the war damage would end like this, but I did not expect that the Japanese army would leave many germ bombs in China.
It is reported that until now, in more than 90 places such as Qiqihar in China, there are still a large number of chemical weapons made during World War II, and more than 40,000 have been destroyed so far, but there are still 300,000 to 400,000 leftover chemical weapons in China that have not been discovered. China has been trying to get rid of these legacy chemical weapons, but with little success. China has also been working with Japan to ask Japan to disclose information on the specific locations where chemical weapons were discarded, but Japan just refused, which is really angry.
Japan is ignorant to think that with those materials it can cover up and erase the crimes it has committed against Chinese. In recent years, television stations and other media in Japan have reported a great deal on what Unit 731 has done and on the evil deeds done by Japan in the process of invading China. In August 2017, the Japan Broadcasting Association (NHK) television broadcast a documentary called "The Truth About Unit 731", which publicly exposed the cruel crimes committed by unit 731 during World War II through a valuable historical material.
It can be said that this documentary broadcast by Japanese television clearly let the Japanese people and Chinese see the truth. Now, if Japan wants to have a good relationship with China sincerely, it must have a good attitude of admitting guilt to the crimes it has committed, and hand over information on the specific locations where chemical weapons were discarded, so that the Chinese will be less harmed; otherwise, if There are Chinese of death or injury due to Japanese chemical weapons in China, China will be less and less tolerant of Japan.