If you have mastered the Juexue of Liu Ren, can you combine the other two Juexue? How useful and valuable is it to me?

It can be seen that the landlord is a beginner who is easy to learn, because he is still confused about learning and choosing which one. Let me put it briefly: Taiyi is suitable for measuring the military affairs of Heaven and National Movement, the movement of celestial bodies, the rise and fall of the country, and various military situations; Daoism, geodesy and geography are some negative invisible information such as yin and yang experts and topography; It is a trivial matter in the world to measure personnel with the help of the six lords, and the last two problems can be measured by the six lords. "Song of Six Benevolents" says: Three-body roots are the same, and there are not many beauties. The three kinds of roots are the same, so it is suggested that the landlord learn Liu Ren first, which is the basis of easy learning. After learning it, he will basically enter the door of all the roots of Shu Shu. Generally speaking, upstairs "those who are easy to change do not predict" is a direct application of external reaction, while those who abandon divination should be a psychological change, but none of the three types belong to psychological change, and external reaction should belong to a higher level in psychological change. What about "those who are easy to change do not predict"? I only know the answer upstairs, but I don't know why. Yi gua means to use plum blossoms to calculate hexagrams, and at the same time, to take pictures from the outside, and to set good and bad luck and hexagrams for reference. As for the three, as far as I am concerned, the six gods of benevolence and evil spirits are clearly classified, some of them only represent one meaning, while the hexagrams of plum blossoms have multiple meanings, which is why plum blossoms are easier to achieve, that is, they are more accurate than plum blossoms, so they are used as images when they are useless.