What does the figure-of-eight singularity mean?

Eight-character odd refers to: clear is clean and not turbid, one is expensive, and many are unclear. For example, if there is no mixture of official killing and palace killing, this official is called an honest official. For example, only one person died, and no official said it was expensive. If there are officials and killers in the eight characters, you can't understand both black and white. Other ten gods of the same kind, and so on, take one as clear. There are two forms of strangeness: three strangeness in heaven, three strangeness in earth and three strangeness in people. Another meaning is that the official seal of the eight-character dry day is the first seven.