cheng, also known as the King of Soles, is a marine bivalve mollusk with an elongated body and a bamboo tube shape after the two shells are folded, hence its name. With high nutritional value, large-scale artificial breeding has begun. The common one is Solen grandis. Shells are smooth, yellow-brown, shiny, and the shell is brittle and thin; The surface is prominent, the back edge is parallel to the belly edge, the back end is pure round, rectangular, and the growth line is obvious, about 11 cm long, like two broken bamboo slices, so it is called bamboo razor. It is distributed along the north and south coasts of China. The meat is delicious, both fresh and dried. Sole usually has smooth surface, yellow-brown skin, luster and brittle shell, while the original skin of old individuals often falls off and is white; The face is prominent, the back edge is parallel to the belly edge, the back end is pure round and rectangular, and the growth line is obvious, about 11 cm long, like two broken bamboo pieces. The inside of the shell is white, and some can see reddish bands. Foot muscles are yellow and white, extremely developed; The muscle scar of the anterior obturator is long, and the muscle scar of the posterior obturator is triangular. The outlet pipe and inlet pipe often extend out of the shell, short and thick. Habitat in shallow sea and intertidal sand, dig holes to live, such as putting some salt water into the holes, animals can jump out of the holes, and the water pipes are easy to cut themselves when they are frightened.