What does the eight-character Wu Jia mean?

Guisi is one of the main branches, with a rank of thirty. The former is Ren Chen and the latter is Wu Jia. On yin and yang and five elements, the heavenly stem belongs to yin water and the earthly branch belongs to yin fire, indicating that fire and water are equal;

B has always been one of the main branches, and the order is 42. The former is Chen Jia and the latter is Wu Bing. On the five elements of yin and yang, the heavenly stem is the second wood of yin, and the earthly branch is the fire of yin, which is the fire of wood. Ding Wei:

Ding Si is one of the main branches, with a rank of fifty-four. The former is Chen Bing and the latter is Wu Wu. On the theory of yin and yang and five elements, the heavenly stems belong to yin fire and the earthly branches belong to yin fire, which is a good ratio.

Keith:

It has always been one of the main branches, and this command is the sixth. The former is Chen Wu and the latter is Geng Wu. On the five elements of yin and yang, the heavenly stems belong to yin soil, and the earthly branches belong to yin fire, which is the birth of fire soil.