Summer tonic is suitable for drinking duck soup. Duck meat is not only rich in nutrients such as protein, vitamins and minerals that people need urgently in summer, but also can prevent and treat diseases. The secret lies in the fact that duck is a waterfowl, which is cold in nature and has the functions of nourishing yin, tonifying deficiency, nourishing stomach and benefiting water. From the treatment principle of "heat is cold" in traditional Chinese medicine, it is especially suitable for people with heat and internal heat, such as low fever, weakness, anorexia, dry stool and edema, which are common symptoms in summer. Drink duck soup tonic, it is best to combine their physical condition, with Chinese medicine or food. For people who are usually vulnerable to respiratory diseases such as cough and cold, yam, lotus seeds, astragalus root or American ginseng can be added when making duck soup, generally 30~60 grams. For patients with hypertension, black beans or red beans and 60-100g of Lycium barbarum can be added when making duck soup. For diabetics, bitter gourd and 50 grams of Euphorbia humifusa can be added when making duck soup. For pulmonary tuberculosis patients, lily, cordyceps or radix adenophorae can be added when making duck soup. For women, when making duck soup, lily and Polygonatum odoratum are added to play the role of beauty and skin care. Some people like to drink duck soup in summer, because the fat of duck is thinner than that of ordinary duck, and the soup is lighter. Chinese medicine and food such as yam, coix seed, lotus root, carrot, fruit and corn should be added to the duck soup. These ingredients are also rich in nutritional value: yam is a kind of food with high nutrition and low calorie, so you can safely eat more without worrying about getting fat. Coix seed is superior to ganoderma lucidum and has high medicinal and nutritional value. Carotene can remove free radicals that cause human aging, and nutrients such as B vitamins and vitamin C also have the effects of moisturizing and anti-aging. Lotus root is fragrant and soft, which has the effects of nourishing the heart and spleen, nourishing skin and promoting blood circulation, quenching thirst and diuresis. Fruit corn is rich in vitamins A, B 1, B2, C, E, carotene and linoleic acid, minerals and free amino acids, which are easy to be digested and absorbed by human body. Before making soup, wash Coicis Semen and soak it in water for 30 minutes. Ma duck is soaked in cold water for a period of time in advance to remove the congestion inside, and then boiled with boiling water, which not only can remove the earthy smell of duck meat well, but also make the soup sweeter and clearer. Add an appropriate amount of water to the soup pot, bring it to a boil, add shallots, ginger slices, coix seed and duck, and cook it together. After the water is boiled, turn it into a medium fire pot for about 90 minutes. Then add the chopped carrots, yam and lotus root in turn and cook the soup for 30 minutes. Before drinking, skim off the excess oil flowers floating on the soup and add a little salt to taste. This soup is characterized by milky white, coix seed, yam and carrot, sweet lotus root and corn, and delicious taste. Be careful not to add monosodium glutamate to the soup, because the soup cooked with chicken, fish, duck and bones is very fresh. Raw lotus root is cold, but cooked lotus root is warm, so if you cook lotus root soup in summer, you can also put some mung beans to neutralize its heat.