There are seven children in one afternoon, all of which are odd. Why does Feng Shui describe Mount Wuzi as a shady mountain?

In feng shui, we have yin and yang, not just single or even numbers. Only the heavenly stems and osmanthus water are hidden in the earthly branches, and the osmanthus water is cloudy, so the branches are negative, just as we usually say that the night is cloudy. In the midday fire, he and his own soil are hidden, and he and his own soil are yin, and Ding is yin fire and his own soil, so midnight is yin. You got it? Not only singular or even.