What do you mean by hiding B in the sun column?

Is that there is dry residual gas hidden in the underground branch.

According to the knowledge of Buyiju Fortune-telling Network, B is the second wood, and the earthly branch not only represents its own qi, but also contains one or two heavenly stems and five elements. Dry B in the solar column is the residual gas in the earth branch.

The eight-character sun column refers to heavenly stems and earthly branches on the day of birth, which can also be said to be the fifth and sixth words in the birth. Solemnly declare: the answer is for reference only, please don't be blindly superstitious.