To strengthen the spleen and stomach, you can use Codonopsis, Rhizoma Atractylodis Macrocephalae, and Poria to brew water to drink as tea. However, the active ingredients of Chinese medicine in water cannot be completely analyzed, so its efficacy is limited. 1. Radix Codonopsis pilosulae: It can strengthen the spleen and lungs (strengthen the functions of the spleen and lungs), nourish blood and promote the production of fluids. It is used for spleen and lung qi deficiency, poor appetite and tiredness, cough and asthma, deficiency of qi and blood, yellowish color (yellowish and lusterless), palpitation (rapid heartbeat, often accompanied by panic), shortness of breath, thirst due to injury of fluid, and thirst due to internal heat (internal heat accompanied by symptoms such as eating more, drinking more, and urinating more). 2. Rhizoma Atractylodis Macrocephalae: strengthens the spleen and strengthens qi, dries dampness and induces diuresis (drying dampness and reducing water-dampness in the body), stops sweating, and calms the fetus. It is used for spleen deficiency with little food, abdominal distension and diarrhea, phlegm-drinking and palpitations (caused by phlegm-drinking and evil qi upward), edema, spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with a little movement), and restlessness of the fetus. 3. Poria: can diuretic and seepage dampness (promote the flow of water to dispel dampness), strengthen the spleen, and tranquilize the heart. It can be used for edema, phlegm, palpitations, spleen deficiency, loose stools, diarrhea, restlessness, palpitations and insomnia. Patients are advised to use the medicine under the guidance of a doctor.