Learn heavenly stems, earthly branches, earthly branches and hidden stems, the relationship between the five elements, and the ten gods, and then you can begin to study decline and prosperity. When you have learned it, you will recite the twelfth birthday later. Of course, the twelve immortals should be able to do it at first, but because they didn't know what it was at first, it was difficult to recite it in a fog.
In addition, the hierarchical method is divided into positive five elements (positive lattice), external lattice and chemical lattice. When you meet the latter two, you can't break it in a positive way.