Method: cut the wax gourd into large pieces; Wash the duck with cold water. Boil a proper amount of water, add wax gourd, duck meat, dried tangerine peel and Euryale ferox, cook for 3 hours, and season with salt. Eat with meals.
Special effects: This Tang Youyi kidney has the functions of consolidating essence, inducing diuresis to reduce swelling, lowering blood sugar and stimulating appetite, and is suitable for diabetic nephropathy, edema, lumbago and proteinuria.