What do these four columns stand for? Do they represent officials?

Pile protection is one of the traditional buildings in China. Opposite the door are cylindrical wood carvings (brick carvings) protruding from the lintel, most of which are engraved with Swiss animals and rare birds (about one foot long). Because it usually appears in even numbers, it is named "household pair".

"Door to door" is only available in the official's yard.

"Hudui" refers to brick carvings and wood carvings placed on the lintel or on both sides of the lintel. The typical wood carving "Hudui" is located above the lintel, generally short cylindrical, each about one foot long, parallel to the ground and perpendicular to the lintel; Houses carved with bricks are located on both sides of the lintel, and most of them are engraved with patterns with the theme of Swiss animals and rare birds.

Generally, the column is a civilian, and the hexagonal square column is a military attache. When there are festivals at home, you can hang lanterns specially. Household pairs are perpendicular to the lintel and located above the portal, taking even numbers, some are two pairs and some are four pairs, hence the name "household pairs". The size of the "household pair" is directly proportional to the size of the official goods. There can be six "door-to-door" products, four "six-to-seven" products, two below, and two ordinary large households. There must be a "door" for a house with a "door".

As can be seen from the above picture, this is the residence of a military attache, with six or seven products.