Feng Shui Bagua Mirrors. We have Concave Mirrors bulge inward and Convex Mirrors bulge outward. Metaphysical Beliefs, Convex, deflects negative energy. Concave, draws in positive energy. A traditional mirror centered wood Bagua used to keep energies flowing smoothly. Mirrors activate, enhance and circulate Chi. Uses include deflecting negative energy by placing on the outside structures and doors, enlarging small dark areas, bringing out disappearing walls and doubling existing views and windows. They provide protection, reroute Chi, and amplify existing light. Since mirrors are a water element, they are often placed over fireplaces. Circular, oval, column like and octagonal shapes are best.