As for the birth date, it means the year, month, day and hour plus the heavenly stems and earthly branches. It is inherent in everyone. Believe it or not, it exists in real terms. Fortune telling is based on the five elements belonging to the heavenly stems and earthly branches. The calculated results are up to you to believe it or not. People have unknown knowledge about themselves and things that have not been tested in practice. It is best not to believe or disbelieve easily, otherwise you will easily lose or miss the knowledge or people that are useful to you.