Donkey hide gelatin is the skin of a donkey belonging to the equine family. It is boiled after being soaked and depilated. Its effect is to replenish blood, nourish yin, moisten lung and stop bleeding. Clinical application: 1. Blood deficiency. This product is a kind of sentimental product with blood and flesh. It is sweet and moist. It is a necessary medicine for tonifying blood. It is used to treat various syndromes of blood deficiency, especially those caused by bleeding; 2. Hemorrhage, this taste sweet sticky, for hemostasis medicine; 3. This product can nourish yin and moisten lung, treat lung heat and yin deficiency, dry expectoration, dry throat, blood in sputum, etc; 4. Febrile diseases injure yin, upset insomnia, yin deficiency and wind movement, etc. Ejiao has a good effect of enriching blood, nourishing yin and moistening lung, but it is sticky and hinders digestion, so it should be taken on an empty stomach in the morning.