This is the sixty-ninth birthday of Master Li, which is considered one of the few extremely important days in an elderly person's life.
In fact, this is a custom; many people say the seventieth birthday, but it is not actually such a round number being celebrated.
For an elderly person's birthday, any ten years can be called a grand birthday, like "fiftieth birthday" or "sixtieth birthday" or "seventieth birthday," but this is just a lucky name. In fact, many elderly people celebrate birthdays not at round numbers, but at forty-nine, fifty-nine, sixty-nine, the age ending in nine.
Because nine is the largest number among the ten digits, in many places, to seek good fortune, the custom of celebrating nine rather than ten has formed.
