According to the analysis of Chinese characters, Yao is a pictophonetic character, pronounced "Mao", and the age of Yao is about 80 to 90 years old. Yi, pronounced "Die", is 80 years old. Eighty-year-olds refer to 80 to 90 years old, and sometimes refer to very old people. People who live to 80 to 90 years old are very old, not only in ancient times, but also in modern times.

As for the 80-year-old man, Cao Cao wrote in "On Wine" during the Three Kingdoms period: "Die at 80", which means that you will die even if you live to 80 or 90 years old. Pu Songling's Strange Tales from a Lonely Studio: "Expensive or not, expensive is exhausted." After all, not everyone can have both wealth and longevity. It is enough to become one of them and an old man. In ancient times, there was a difference between Fu and Shou. Generally speaking, men call it "longevity" and women call it "blessing", but now we generally call it longevity.

The old saying about the age of the elderly:

Like 77 years old, 88 years old is also a lucky life, because the word "rice" is exactly a plus eight, an inverted eight and a ten. So 88 years old is also called "Mi Shou". 100 years old is a very meaningful age, and it is also the highest life expectancy in the academic language of health preservation, which is called "longevity". 99 years old, before 100 years old, because the word "hundred" is missing, it is called "hundred years old".