What kind of eight characters are suitable for learning metaphysics?

Kind of funny. I've been studying metaphysics for so many years, and I've never heard that learning metaphysics depends on eight characters. Mainly depends on whether the master is strong or not. The best relationship is father-son relationship, because there is nothing to hide, nothing to keep, and nothing else. There are many kinds of metaphysics, most of which are dead. You can write it down and find something to die slowly when you use it, such as fortune telling. It's a bit difficult to live, such as finding a burial place. Usually take you all over the mountain. It is very tiring and difficult to understand, and it is difficult to add a few good places.