The so-called "calendar year" refers to the end of life. According to the ancients, the "Gregorian calendar year" of human beings should be 120 years old. This life span is still very long, but most people can't reach this life span. This may be related to our current eating habits and daily routine.

The name "Tiannian" first appeared in Huangdi Neijing. There is a passage in Huangdi Neijing: Buddhism is based on Yin and Yang, harmony is based on tricks, and if you live regularly and eat regularly, you will be in harmony with the spirit, and you will be able to spend your life and reach your centenary.

This sentence means that we should not artificially hurt our yang at any time and anywhere, but actively cultivate our yang in various ways at any time to enhance our self-healing ability. As long as the sun is the spirit, it is not a dream to live to the age of life.

Besides, it also teaches us to live regularly, eat moderately and not in vain. To put it simply, we should go to bed early and get up early, eat healthy food, don't overeat and don't overwork.

In fact, this is the health knowledge we all know, but it is a bit difficult to do. Because of the pressure of life and the fast pace of life, many times we have to go to those "mainstream" lifestyles with the public.

However, the way of conditioning the body in Huangdi Neijing is actually worth learning. Because any medication is not as valuable as the immunity brought by our own physical quality. Therefore, the way to preserve one's health is to raise one's body to a higher level first, and then cultivate one's morality to pursue the way of life.