From the perspective of geomantic omen, the road in front of the house must not arch outward. The road and river in front of the house are arched or arc-shaped. Facing the door, it will form a straight bow sword, also called anti-bow water, which will pose a threat to residents and lead to lotus flowers and lawsuits. As the saying goes; Bow straight in front of the sword house, and there are often great disasters at home. In case there is a telephone pole or an erect tree on the opposite side, it just forms a sword through the heart. It is easy to cause accidental injuries, which is not good for the career and the women at home.