China numerology = how old can't you have a birthday?

You can't have a birthday at 80. There is an allusion: In ancient times, there was an old man who had many children and grandchildren. One day it happened to be his 80th birthday. The children held a grand banquet for him, and the guests were packed. People come and go all day, and all the guests are provided with food and wine, but the family forgot that my father was still waiting for dinner in the house. The old man was hungry one day and said, I can't make it to my eightieth birthday. I was hungry all day. Ha! This matter has been passed down to this day, and my local old people don't celebrate their 80th birthdays. Change your 80th birthday to 79.