How to understand the eight-character arch

In the three-in-one game, in the absence of China, the eight-character arch saw two branches of the tomb. For example, when you ask a question, you only see the yin guarding but not the noon, which does not necessarily lead to the yin guarding being a fire, only when the internal heat is dominant (for example, on Ding). ) you can use fire, and the luck of the new year will see the trinity in the afternoon. Can be in (such as Renziyue), can not arch fire. Even at noon on New Year's Eve, the structure of this triad is unstable and can't be fully integrated ... for reference only.