There are many forms of geomantic omen, such as Lu Chong, Men Chong, Sharp Corner Chong, Sharp Tower Chong, or Anti-Bow Chong, Shutter Chong, Sickle Chong, Church Cycle, Grave Shadow Chong, and Fierce Fire Chong by the Chief Fire Officer. These are all manifestations of geomantic omen outside, but inside, there are many manifestations of geomantic omen everywhere because of the layout, structure or decoration of houses and furniture. For example, these usually need some geomantic props to turn evil, or melt or block or avoid or control.