eight characters, also called four pillars, are the eight characters of heavenly stems and earthly branches found in the calendar, which represent the year, month, day and hour of a person's birth with the heavenly stems and earthly branches of heaven and earth. Together, they are eight characters. Your four pillars (also known as eight characters) are: Wu Chen
Xin You
Bing Shen
Ren Chen (year, month, day and hour). For example, if you were born at the end of autumn and are rich, your life span will be slightly short (one hour away is September Festival).