Qiányú is a major catfish in North America, which is suitable for breeding in most parts of China. Chelated fish has high nutritional value and is characterized by freshness and nourishing. Besides invigorating spleen and diuresis, it also has the effects of promoting blood circulation, relieving flatulence, nourishing yin and strengthening yang, nourishing blood and tonifying deficiency, nourishing heart and kidney, and reducing swelling. It has a certain dietotherapy effect on edema, beriberi, soreness of waist and legs, hemorrhoids, scabies, earache and trachoma, and also has the functions of promoting lactation, enriching blood and preventing measles and trachoma.