How to operate and use Zhouyi

Friend, your question is a bit big. In a word, there are two categories in Zhouyi, namely, the division of reason and law. Of course, you don't need to operate them, just understand them. Technology is operable and available, but there are many kinds of technologies. I don't know which one you are asking. A person's energy is limited, so it's good to be proficient in one or two subjects. Let me introduce some to you. First, take the class, also known as "six hexagrams" and "fire bead forest"; Second, the eight characters, also known as fortune telling, dividing, and four pillars; These are the students with the largest number at present. In addition, there are geomantic omen, physiognomy, plum blossom easy to count, Taoist magic, great Liu Ren, Taiyi, iron plate magic and so on, in which the essence and dross coexist.