What is virtual taboo? How to judge whether the eight characters are missing five elements or the underground branches are hidden?

The five elements and eight characters that did not appear in the original fate are taboos of the yen, which is a false taboo. (However, there are also five elements that appear in the original life, and they are taboo for the yen, because the death of these five elements in the air is also a virtual taboo).

If the same qi or the original qi of the five elements is not revealed in the original life, it is also a virtual taboo. If you are jealous of wood, heavenly stems and earthly branches can't see wood at all. The ground support is Chen, and the two trees are neat. In those days, the sky was dry and things were dry, and the branches of the earth were not covered with wood, so they were unable to avoid god. However, when the branches of the earth are covered with wood, God becomes real from emptiness, not static.