Is the bottom of the bed closed on all sides?

All right. Closed bed bottom, clean the floor when loading the bed, which is convenient for cleaning. If the bed bottom is empty and there is a lot of dust, it is very troublesome to clean it up. "Bed" is a semi-closed structure, which was first seen in bronze inscriptions. The original meaning of bed is common furniture for sleeping and lying down, and later it is extended to an object similar to a bed.