If the gate is facing the fence needle, there is a chopping block.
If it is facing the awning of the inclined iron sheet or the sloping edge of the tile house, it is called the blade demon. Generally, water is put at the door to dissolve, that is, water is the enemy of the knife, and the knife can never stop cutting water, so it can be dissolved with this water. Alternatively, you can hang a grindstone on the outside of the door to dissolve it, that is, polish the blade to dissolve it. These are easy to learn methods.
If it is a sword, and the shape of the building is a sword or a bladed building, you can put a metal incense burner outside the door, called a bear furnace, to refine the sword and melt it.
If it is an antenna fishbone, it is usually solved by pointed leaves or convex mirrors. Avoid flat mirrors or concave mirror. Because the flat mirror can collect or reflect, be careful. concave mirror is used to collect gas. Avoid using them.