standing at 3, not confused at 4, knowing destiny at 5, obedient at 6, and octogenarian at 7. The ancients believed that an accomplished person should establish or establish his own career at the age of 3, and at the age of 4, a person reached the most mature period, experienced social bumps, and was no longer confused by the world. At the age of 5, a person's ability in this life has almost been brought into play, and he has seen clearly his future and his destiny, so he says "knowing his destiny." At the age of 6, I have looked down on life, and it doesn't matter whether the gossip around me is good or not, so it's called the year of "hearing", and at the age of 7, I'm not so flexible in walking and acting, which is called the octogenarian year.