This is called Zhu Cheng, invertebrate, mollusk, petabranchia, Zhu Cheng family. The common one is Soren Grandis. The shell is smooth, yellowish brown and shiny. The shell is brittle and thin; The surface is prominent, the rear edge is parallel to the belly edge, and the rear end is round and rectangular, with obvious growth line, about 1 1 cm long, like two broken bamboo pieces, so it is called Kun. It is distributed in the north and south coasts of China. Meat is delicious, whether fresh or dry.

Pork is sweet and salty, cold in nature, and enters the heart, liver and kidney meridians;

Has the effects of nourishing yin, clearing away heat, relieving vexation and relieving alcoholism.

It has certain curative effect on postpartum weakness, vexation with heat and thirst, damp-heat edema, dysentery, drunkenness and so on.

Sauron has high nutritional value and economic value. Its meat is delicious, which can be eaten fresh or dry. It has a huge body, well-developed foot muscles, delicious taste and rich nutrition. It contains protein, fat, sugar, ash, calcium, phosphorus, iron, iodine and vitamins, and is a delicious and nutritious seafood treasure. Soren also has medicinal value. According to medical records, its shell has the functions of dispersing stagnation, diminishing inflammation, relieving stranguria and stopping leukorrhagia, while the meat of razor clam has the functions of clearing away heat, improving eyesight, quenching thirst, relieving hangover, bleeding from women's strain and promoting lactation, which is a good dietotherapy product beneficial to human health and is well received by people.