Literally, it is not difficult to understand what "on" means, and the bottom and middle are naturally on the back. In ancient times, it was "ancient" for people to live to 70 years old, and it was almost impossible to live to 70 years old. So the ancients called it 90th birthday, that's what it means. Of course, it is a human wish to live to a hundred years. Bai Shou: It means 99 years old, and one percent is 99, so it means 99 years old.

Other age titles

80 years old, the ancients called it the year of the dynasty, the year of the dynasty and the year of death: all refer to 80 or 90 years old.

Yao: It refers to eighty or ninety years old, and generally refers to old people, such as old women and octogenarians.

Yao [Mao] wrote in "On Salt and Iron, the Book of Filial Piety": "Seventy is Yao." "Book of Rites Quli" says: "890 is the time to die." Yi [dié], "Erya Shi Yan" Note: "Eighty is the best." Combined with the above statement, we can see that "one age" refers to a person's longevity, which is probably "seven old and eighty". [mo][dié]: refers to old age. Mao in his eighties and nineties. This cave is seventy or eighty years old. Mao and die mean eighty or ninety years old. Mao Chuan added, "You old man, you are eighty years old." Later generations called this 80-year-old man "very old".

The year of [gross] and [death]: refers to eighty or ninety years old. Ninety-year-olds can also be called octogenarians.

Middle age: refers to over 80 years old. Umbrella is 80 years old. Because the grass with the word "umbrella" looks like "eighty", it is called "umbrella life".

Mi Shou: It means 88 years old. Because the word rice looks like eighty-eight, which means eighty-eight. In addition, it also means that although you are old, you have a great appetite.