It refers to making complex scenes and things in a narrow and simple place, which is now called "making a dojo in a snail shell".

Bellamyaquadrata is the common name of the square snail, which is the whole body of the snails of the family Snails or other animals of the same genus. There are also other names such as lake snail, stone snail, bean field snail, golden snail, snail cow, etc. Distributed in most areas of the country.

The snail shell is conical, thick, about 3 cm high, with a top tip, 7 snail layers, deep sutures, and a slightly larger body snail layer; the shell surface is yellowish brown or dark brown, with obvious Growth lines and thick whorls. The shell mouth is oval with complete edges. The skin is horny, yellowish brown, oval, smooth, with concentric ring-shaped growth lines.

The body is soft, the head is cylindrical, and there is a protruding muzzle at the front end; there is a pair of tentacles at the base of the mouth, and there is a raised eye on the outside of the base of each tentacle.

The feet are located below the head, large in shape, and broad in plantar surface. The head and feet can be retracted into the shell. After retracting, the jaws will close the shell.

Live in rivers, lakes, ponds and paddy fields; mostly inhabit the bottom of water with more humus. Feeds on the skin of algae and other plants. It is distributed in most areas of the country.