Why is the four-poster girl called a coffin? Improper collocation of yin and yang in the eight characters and five elements will lead to loss of yin and yang, especially those who are all yin and yang in the eight characters.
Four columns and eight columns are composed of even heavenly stems and earthly branches, which is a four-column pure negative picture. Eight' characters' in eight characters belong to Yin, heavenly stems belong to Yin, and earthly branches belong to Yin. Women with pure yin in eight characters, in fact, their hard life is true.