How long you can live and how long you want to live depends mainly on your own numerology. The vitality characteristics of each person in the eight characters are determined by the state of "essence, qi and spirit" given to you by the five elements of the eight characters. Rigorous, energetic, calm and natural, you will live a long life.
This essence is what medicine now calls genetic genes; This qi is your body, and the key in the eight characters is to look at the health status of various organs in your own body; This god is to see whether the combination of various functional organs is suitable, matched and balanced.