What is the age of Tiannian?

Year refers to the age from 100 to 120. This concept comes from Huangdi Neijing, which describes the process of human growth and aging, and shows that human health and life cycle have certain laws. Specifically, according to this law, the life span of human beings should reach 120 years. However, in fact, few people can reach this age, because diseases, accidents and other reasons will lead to death before reaching the natural age.

Some people may mistakenly think that age is exclusive to the elderly, but in fact, age refers not only to the elderly, but to all ages in life. This concept is also reflected in ancient culture and philosophy. For example, the "destiny" in the Book of Changes means that the whole life cycle of human beings should conform to the laws of nature and the essence of life.

In a word, calendar year is an abstract concept, which refers more to all ages in human life than to a specific age.