Recently, the discussion on Japan's nuclear sewage discharge plan has once again attracted wide attention. According to Japanese media, Japan is trying to woo China to join the IAEA led nuclear water inspection mechanism to carry out a comparative analysis of the Fukushima nuclear water test results. However, China rejected the proposal, leaving Japan's approach in doubt. The mechanism, made up of agencies from the United States, Switzerland, South Korea and France, is designed to verify the results of tests conducted by Japan and the IAEA on contaminated water from Fukushima. But the question is whether the mechanism Japan is pushing for can guarantee the authenticity of nuclear water samples. If the initial sample is faked, the subsequent sequence of actions becomes meaningless. A similar situation plays out in life.