The north is called Haihong , and the south is called mussels. Mussels are a kind of sea mussels, also known as mussels , which are cooked, shelled and dried. Because they are cooked without salt, they are called mussels. Mussels very fresh taste, nutrition is also very rich, it contains protein quality, iodine, calcium and iron than more, but contain very little fat. Produced in Zhejiang, Fujian, Shandong, Liaoning and other coastal provinces. Dry body, fresh color, fat meat is preferred.