Radix Panax Ginseng has the effects of benefiting qi, strengthening the spleen (regulating the qi of the spleen and stomach), generating fluids and moistening the lungs, Ophiopogon has the effects of nourishing yin, generating fluids and moistening the lungs and clearing the heart, Astragalus has the effects of tonifying qi and elevating yang (tonifying qi in order to make yang qi to be elevated and developed), fixing the surface and stopping sweat (stopping sweating by consolidating the surface of the muscle), and inducing water retention and eliminating oedema. Tai zi ginseng is sweet, slightly bitter, neutral in nature, belonging to the spleen and lung meridian, benefiting qi and strengthening the spleen, generating fluids and moistening the lungs. It is often used to treat spleen deficiency and body fatigue, loss of appetite, post-disease weakness, spontaneous sweating (involuntary sweating during the daytime, and sweating aggravated with a little movement), thirst, and dry lung and dry cough. Ophiopogon is sweet, slightly bitter, slightly cold in nature, belonging to the heart, lung and stomach meridian, it has the effect of nourishing yin and generating fluids, moistening the lungs and clearing the heart, it is used for the treatment of dry and dry cough of the lungs, coughing with consumptive cough in yin deficiency, paralysis of the throat (the pharynx is red, swollen and painful or dry with a feeling of a foreign body, or itchy throat with discomfort and difficulty in swallowing), sore throat, thirst with injury of the fluids, thirst with internal heat (the fever in the body accompanied by symptoms of overeating and excessive urination with more drinking and more food), heartburn with insomnia and constipation with dryness of the intestines. Astragalus is sweet in flavor, slightly warm in nature, and belongs to the lung and spleen meridians. It has the effects of tonifying qi and elevating yang, fixing the surface and stopping sweating, inducing diuresis to reduce swelling, generating fluid and nourishing the blood (to replenish the body’s water and blood), and astringing sores and promoting the growth of muscles (to help sores to heal more quickly and promote the growth of new flesh). Astragalus is used in the treatment of qi deficiency and weakness, loose stools (thin and unformed stools), prolonged diarrhea and prolapse of the anus, sweating (due to the weakness of the surface of the muscles and frequent natural sweating), qi deficiency and edema, internal heat and thirst, hemiplegia (one side of the limbs can not be moved freely), paralysis and numbness, and prolonged ulceration and non-constriction. Note that the adverse reactions and contraindications of the above drugs are not clear, the drug should be used under the guidance of a doctor, not self-medication.