Yi is the name of this hexagram. Yi means to raise, which is related to diet and nutrition. My understanding is: human life is limited to 100 years, so it is called time limit; The fascinating thing in diet and daily life is nothing more than health preservation, so it is called maintenance. In addition, Yi: centenarians. Originated from The Book of Rites and Songs edited by Dai Sheng in Han Dynasty: "Ten years' life means learning as a teenager; Twenty is weak and crowned; " Thirty years old is very strong, and you have a room ... eighty is a cave, ninety is a cave ... a hundred years is a lifetime. This means that life lasts for a hundred years, so it is called "the year of life". During the period, Zhu Xiang talked about the meaning of "the turn of the week", that is, turning around, "it is said that more than one hundred years have passed." "H, what Zhu said is" just to raise. "That is, living and caring for others. Yi is a centenarian. This means that at this time, food and shelter are expected to be taken care of by future generations. Chen Yuan Hao explained: "Life is a hundred years, so it is a period; I am also embarrassed when I am eating and drinking. " Zheng Xuan's note: "The period is still important; Easy and nurturing. I don't know the smell of clothes, but the dutiful son should try his best to cultivate Buddhism. It means that when a person reaches the age of 100, he needs the care of his dutiful son in all aspects such as diet and daily life, so "centenarian" is called "Yiyi". I hope the landlord is satisfied