it is against the original intention of worshipping God to put Guan Gong at the door, and it is not proper to regard him as a passing god.
in folk beliefs, the position of the civil and military god of wealth is very particular. The god of wealth should be placed at the left and right positions at the entrance, and must face his own room. The same is true of offering Fu, Shou, Lu Samsung and Caibo Xingjun as Guan Gong, the god of wealth, so as to enrich his wealth and protect the whole family. However, Wu Caishen, like Guan Gong, has to face the outside of the gate house, so that it can not only make a fortune, but also protect the family's safety.