When the statue is closed, the knife dust stands upright, that is, a straight knife. Used to put in the spacious nave, the function is the town house. There is nothing wrong with this house, just for peace.
Close the statue and swing the knife down, that is, split the knife. Used in some indoor places, the function is to exorcise evil spirits. In other words, there are often disturbing factors in this house, and the statue of Guan Gong is placed to drive away evil spirits.
Guan Yu sits like a statue, and Zhou Cang holds a knife, which is a group portrait. Most of them are seen in Taoist temples and monasteries, and they are not spared at home.
Don't put it in the bedroom, because it's too strong, and it's easy to dream or get mass annihilation.
It should be at the door. If it is to ensure the safety of the house, Guan Gong's knife is inward. If it's business, the blade is facing outwards. However, the statue of Guan can't be placed casually, because it is easy to provoke lotus flower. You'd better find some professionals to see if your feng shui and all aspects are suitable for Guan Yu.