Household appliances made of reed mats or bamboo chips are shaped like washbasins and have many holes. It's for filtering. When in use, large objects stay inside and small objects fall out of the holes.
It can be defined as a porous structure, which separates substances according to particle size through certain dynamic action. Common square holes, round holes and rectangular holes.
Synonym: dustpan
A dustpan, pinyin is bijiji, which is a Chinese character. There are three definitions. One is a shovel-shaped appliance for loading garbage; The second type is a seedling raising and chaff removing device woven with rattan or peeled wicker and bamboo; The third refers to dustpan-shaped fingerprint, which is a kind of fingerprint. Everyone's fingerprints are different. There is a closed circle in the middle, which is called "basket" (commonly known as "bucket" in folk). If the opening extends outward, it is called a dustpan.