It belongs to marine mollusks, Gastropoda and Oncomelania. The shell is thick, the top is round, there are two layers of snails, the height is about 20 ~ 30cm, the body is extremely swollen, and it weighs about 1000 ~ 3000g like a horseshoe. It lives in rocks on the seabed, mainly in China, Japan, the Philippines and the Pacific Ocean, as well as the Yellow Sea, the East China Sea and the South China Sea, but in small quantities. China has a long history of eating rattlesnakes. According to historical records, it can be traced back to the Sui and Tang Dynasties, and it was more extensive in the Ming and Qing Dynasties. According to the health care meaning of the Song family, the protein content of rattlesnakes is as high as 1 1.8%, and there are also many contents of calcium, phosphorus and iron. Snails, with plump meat and abalone-like taste, are suitable for many cooking methods, and their dried "snail slices" are good raw materials for cooking. After processing, the taste and taste are like processed dried abalone. Chinese medicine believes that it also has medical value. Luo Xiang tablets are sweet in meat and cool in nature, which can improve eyesight, cure heart-felt heat and pain, stimulate appetite, relieve depression, nourish and beautify. Snail slices are often regarded as dried products. Before eating, it must go through several processes such as soaking, cleaning and firing to become a good cooking material.