Why does Qimen analysis require years of life?

Personally, I think the main benefit of using life span is to pursue greater information overlap. We all know that if there is more repeated information in a bureau, the more complicated the matter will be. It is easy to judge, just like Liuren. Using Shenman, it means that the Rigan sometimes cannot specifically represent the person who is testing, especially when there are many people in the same game, and the Shigan generally only represents the current state of things, and we generally predict The future development trend of things. In this case, the information displayed by the hour stem may not necessarily represent the future situation of the matter. Therefore, the year life is added to the analysis. First, to see if the year life can be related to the day stem and hour stem. , if there is a relationship, the information on this person measured by this bureau is very accurate. Secondly, according to experience, the accuracy of the information on life expectancy is generally higher than that on daily life. Sometimes we feel that Qi Men Shi is not on time or accurate, and the main problem is that the information is not accurate or the information is not obvious.