Tiannian is a meaningful proposition about life in ancient China. Years, that is, the natural years of life, is a person's natural life span while keeping various organs of the body in a healthy state, that is, natural life span.

Both Lao Zi and Wang Bing think that the age of Tian is 120 years old. 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.

Extended data:

With the progress of medicine and medical means, more and more diseases have been cured, and the life span of human beings has been gradually extended. Will the average life expectancy of human beings really reach 120 years, or even 150 years?

"We can't make a prediction yet." Aaron ciechanover said that the extension of human life has triggered some new diseases or diseases that were not paid attention to before, such as cancer, diabetes, Alzheimer's disease and so on.

In his view, the relationship between medical care and disease is a bit like "the height of the road is one foot and the height of the magic is one foot", but personalized medical care will become a key to winning the disease.

Baidu Encyclopedia-Tiannian