What do you mean by dry Geng Xin? ask the way

Branches and branches, each branch contains 1-3 aerial stems, and the nature of Tibet is the same as that of aerial stems, that is, through stems.

For example, Jia, the heavenly stem is A, which belongs to Yang wood, and the earthly branch is Yin zang, which is A, C and E respectively. The earthly branches hide armor in the shade, and the heavenly stems are armor. This is dry nail. So is your question, Geng Xin. When Tiangan and Geng Xin meet in the same column, it is Tou.