At present, the oldest recorded person is a Japanese old man with a life span of 1 17 years. Although some people in China claimed to be alive 1, they were in their thirties, and even a man named Li Qingyuan claimed to be 256 years old, but due to the imprecise household registration management system in ancient and modern China, there was no identity card and birth certificate, and the situation in China in the past two hundred years was turbulent, and household registration materials were lost, it was impossible to confirm the authenticity of his age and it was not officially recognized.