Because the qi of the earth branch is mixed and impure, there are different opinions on how to choose the moon blade grid. In general, only three branches are selected as the monthly cutter grids, and the rest are not discussed according to the monthly cutter grids. Find the hidden stem as a grid and replace it with three branches, that is, "Zi, Mao and You" only have their own gas, and there is no miscellaneous gas in the ground. Specifically: "Only when A meets Uzuki, Geng meets the moon, and Ren meets the moon, the three groups will be the moon blades". Because every branch of the moon contains vitality, there is no impurity. If there is an annual margin of other monthly branches, the middle qi and residual qi are taken as the right, and the life case is determined by eight grids, and the monthly margin grid is not taken. For example, when you are born, only when you take Yin, C fire will hurt your official position or personal status, so you can take it flexibly. Jin Xin, for example, was born in Shen Yue. Only if Shen Zhong hid water as an official position, or Wu Tu as a printed case, the rest would be imitated.