China Naming Network - Weather knowledge - What is the meaning of "Hezi" mentioned in Feng Shui Shan 24?

What is the meaning of "Hezi" mentioned in Feng Shui Shan 24?

Renzigui belongs to the north, and Bingwuding belongs to the south.

Renshan is also a child, which means that the direction of the constellation must be due north, but the hexagram cannot determine whether it is a constellation or a constellation. The direction marking line of the constellation of the compass is in the center of the non-hexagram and the sub-hexagram, which will only affect the arrangement and rise and fall of the flying stars in the sky.