In fact, the earliest suitable couples were separated. It is said that stone drums were placed in front of the houses of ancient people, on the one hand, as a town house, and on the other hand, as a symbol of the owner's identity, because there were strict regulations on houses in ancient times. Ordinary people can only use wooden chopping boards instead of stone drums at the gate. Rich and powerful people will put real stone drums and carve exquisite decorations.
"Opposite the door" means that there is an extra piece of wood carving or brick carving on the edge of the lintel, on which some rare animals will be carved, mostly one-to-one. Of course, there is more than one pair, and the number of pairs depends on the level of officials. Generally, the higher the level, the more pairs there are, up to six pairs, and at least two pairs for wealthy families. Relatively speaking, ordinary families have no "home" decoration.
Generally speaking, it is a feudal concept to talk too much about each other's family background, which may be narrow, but different people have different views and cannot generalize. After all, some people think that only family background can match each other's three views, while others think that as long as they get along, it has nothing to do with themselves.