What's the name of the fortune teller who visited him?

There is nothing to explain. Fortune tellers exist. Everything that happens is fate. No one can change fate. Only people with good virtue can change their fortune, but they can't change their lives with the elderly. You should have heard of the relationship between the five elements, so it is normal to be born, sick and dead, so knowing your five elements can predict a person's life span, but some fates cannot be predicted, even fortune tellers can't change it.