What are the three sands used in geomantic omen?

The three evil spirits refer to evil stars, and the evil spirits of feng shui refer to evil spirits. There is a difference between the two. The three evil spirits are evil stars in time, also called evil spirits, disaster spirits and evil spirits. The central evil spirits converge in one direction at the same time, resulting in an evil spirit called the three evil spirits. Breaking the ground will hurt your life, breaking the money will be a disaster, and it will be a disaster if you don't avoid it. If the sun turns three evil spirits, it can avoid disaster and be safe.