Analysis of illness: Hello, Polygonatum sibiricum is sweet in taste and flat in nature, which can benefit qi, nourish yin, strengthen spleen, moisten lung and benefit kidney; Lycium barbarum is sweet and flat, nourishing liver and kidney and benefiting eyes; American ginseng is sweet, slightly bitter, cool, invigorating qi and nourishing yin, clearing away heat and promoting fluid production; Astragalus membranaceus is sweet and slightly warm, and has the effects of invigorating qi and spleen, invigorating yang and relieving depression, benefiting health and consolidating exterior, inducing diuresis to reduce swelling, supporting toxin and promoting granulation. Suggestion: The most important thing of the combination of the four drugs is that they can benefit qi and nourish yin, which is more suitable for patients with deficiency of both qi and yin.