Thunder is an earthquake, and the east is spring thunder, so divination is in the east and moves underground, which is yin and yang.
There is wind in the world, so the wind moves for the world and it is cloudy for Yang Yang.
Water can push the ground out of the valley, the ground moves, yin-yang-yin.
The fire is cold in the middle and hot on the side, which means separation, yang-yin-yang.
The ground rises, the mountains move on the ground, and the yin is yin.
The sky is full of clouds, and the luster is the shadow in the sky, yin and yang.