At present, many corner-filling cards are made of mahogany, which is used to ward off evil spirits, not to fill corners, because corner-filling requires gas field energy, and it is impossible for mahogany to absorb energy. Feng Shui pays attention to the combination of energy and divination, and Feng Shui is the gas field effect, that is to say, on the issue of filling the vacancy angle, it mainly drives the gas field effect on the divination umbrella, thus achieving the purpose of filling the vacancy angle.