Soft-shelled turtle is a kind of advanced nourishing nutrition for ancient dignitaries. The ancients said that "the turtle has pork belly", which means that the turtle is high in protein and low in fat, which is equivalent to the nutrition of five kinds of animal meat.

Carp is rich in protein, iodine and vitamins, and contains a small amount of fat, especially the skirt of turtle's back, which is rich in glial protein and has a good effect of nourishing yin. Because the nail fish is high in protein and low in fat, it is very suitable for nourishing the elderly.