The number of "household pairs" is directly proportional to the level of official positions. In ancient times, there were two pairs of households on the doors of official families with the following three products. Four families are Grade III, six families are Grade II and eight families are Grade I.. Only the emperor's palace can have nine households, which means Jiuding's respect.
Pile protection is one of the traditional buildings in China. "Hudui" refers to brick carvings and wood carvings placed on the lintel or on both sides of the lintel. Usually, it is a short cylinder about a foot long, parallel to the ground and perpendicular to the lintel. The short cylindrical shape of the "protection pile" represents the ancient concept of preferring sons to daughters, which is intended to pray for people's prosperity.