A catty of three sea cucumbers is seven years. Five to seven years of wild sea cucumbers, if they are fresh and live, can have about three to four heads in a catty. Sea cucumber is rich in nutrition, which is not only rich in essential nutrients such as amino acids, fatty acids, vitamins and trace elements, but also contains a variety of bioactive substances such as acidic mucopolysaccharides, saponins and collagen, and has a wide range of health care functions.