This is a meaningful proposition about ancient human life in China. Time is the year of talent, that is, the fate of nature. There is a time limit to human life. Ancient health care experts and doctors thought it was 100 to 120 years old. For example, "Su Wen? On ancient naivety: "To live to a hundred years old is the end of life. " ; Such as "Shangshu? "Hong Fan Pian": "Life is 120 years old", and "Theory of Cultivation" also says: "Life is 120 years old, the same as ever". In addition, Lao Zi and Bing Wang also think that the age is 120. H. Franke, a famous scholar in West Germany, put forward in 197 1: "If a person has neither suffered from diseases nor been adversely affected by exogenous factors, then physical death will not occur until 120 years old." In fact, the age limit of 120 years old is consistent with the general longevity survey data, and there are many examples of exceeding this physiological limit since ancient times.