Astragalus, Maitong, Radix et Rhizoma Ginseng and Radix et Rhizoma Ginseng are used together to tonify Qi and nourish Yin. Astragalus has the effects of tonifying qi and elevating yang (tonifying qi so that yang qi rises), stopping sweating (stopping sweating by reinforcing the surface of the muscle), inducing diuresis and eliminating swelling (relieving urination and eliminating edema), generating fluids and nourishing blood (replenishing the body’s water and blood), mopping up toxins and draining pus, and restraining sores and promoting growth of muscle (helping the sores to heal faster and promoting the growth of new flesh). Radix Codonopsis pilosulae has the effects of strengthening the spleen and lungs (strengthening the functions of the spleen and lungs), tonifying the middle Jiao and benefiting the qi (treating qi deficiency by tonifying the spleen). Radix Panax Ginseng is effective in tonifying Qi, nourishing Yin, clearing heat and generating fluids. Ophiopogon has the effects of nourishing yin and generating fluids (nourishing water and fluids in the body), moistening the lungs and clearing the heart, and is mostly used to regulate qi and yin deficiencies. Taken together, these 4 medicines are often used to treat qi deficiency accompanied by yin deficiency, resulting in qi and yin deficiency (deficiency of both qi and yin fluids). It is recommended to take the above medicines under the guidance of a doctor according to one’s physique and condition to avoid any adverse reaction or delay of the condition.