Crucian carp seems to be due to its collagen, fat, vitamin A, B vitamins and so on. In addition, the content of protein in crucian carp is as high as 20g per100g, which is second only to prawn, and it is easy to digest and absorb, so it can enhance the resistance if eaten frequently. Traditional Chinese medicine believes that crucian carp can tonify deficiency, warm middle-warmer and lower qi, induce diuresis and reduce swelling, and clear fire can cure gastrointestinal bleeding and vomiting and nausea.