American ginseng, Chinese wolfberry and maitake in water has a supplementary effect on tonifying qi and generating fluids, nourishing yin and brightening the eyes, and nourishing yin and reducing fever. 1. American ginseng is cool in nature, sweet and slightly bitter in taste, and belongs to the heart, lung and kidney meridians, with the effect of tonifying qi and nourishing yin, clearing heat and generating fluids. It can be used in the treatment of qi and yin deficiency, deficiency of qi in febrile diseases, thirst and thirst. This product is cold in nature, and should not be taken by those with weakened middle yang and cold dampness in the stomach. It is not suitable to be used with veratrum. 2. Lycium barbarum is flat in nature, sweet in taste, and belongs to the liver and kidney meridians, with the effect of nourishing the liver and kidney, benefiting the essence and brightening the eyes (tonifying the essence and promoting the recovery of eyesight). It is used for deficiency, soreness of waist and knees, dizziness and tinnitus, impotence and spermatorrhea, internal heat and thirst (internal heat accompanied by eating, drinking and urinating), blood deficiency and yellowish color, dimness of the eyes and lack of clarity. 3. Maitong is slightly cold in nature, sweet and slightly bitter in taste, and belongs to the heart, lung and stomach meridians. It is effective in nourishing yin and moistening the lungs (nourishing the lungs by replenishing the lung fluid), benefiting the stomach and generating fluids (nourishing the stomach by replenishing the fluids inside the stomach), and clearing the heart and removing vexation (clearing the vexation and heat inside the heart). Ophiopogon is often used for dry lung cough, cough due to yin deficiency, laryngeal paralysis (redness, swelling and pain in the throat, or dryness, foreign body sensation, or itchy and discomfort in the throat, difficulty in swallowing), sore throat, deficiency of stomach yin (insufficient yin fluid in the stomach), thirst due to injury of the fluid, thirst due to internal heat (internal fever accompanied by symptoms of overeating, excessive drinking, and excessive urination), constipation due to dryness of the intestines, heartburn and insomnia, and so on. The combination of the three in water can be used to tonify the qi and promote the production of fluids, nourish the yin and brighten the eyes, and nourish the yin and reduce fever, and so on. The active ingredient of the drug in water is limited, can not replace the conventional drug therapy, it is recommended to follow the doctor’s instructions standardized diagnosis and treatment, should not be unauthorized medication.