Commonly used medicinal materials include Radix Astragali, Fructus Lycii, Ginseng, Ginseng Rubra, Radix Paeoniae Alba, Fructus Jujubae, and Radix Angelicae Sinensis. Among them, Astragalus membranaceus has the functions of consolidating exterior, stopping sweating, benefiting qi and expelling toxin, and medicated diets containing this medicinal material are mostly used for invigorating qi; Lycium barbarum can nourish yin and improve eyesight, and is mostly used for nourishing yin and tonifying kidney; Ginseng can greatly nourish vitality and can be used to make medicated diet for nourishing yin and yang deficiency; Red ginseng is warm, tonifying kidney and Yiyang, and can be used to make kidney-tonifying medicated diet; Angelica tonifies blood, Radix Paeoniae Alba tonifies liver and kidney, Fructus Jujubae tonifies qi, Radix Aconiti Lateralis Preparata tonifies yang, Radix Jinchai tonifies yin, Rhizoma Atractylodis Macrocephalae dries dampness, strengthens spleen and tonifies qi, Colla Corii Asini tonics essence and blood, and Polygonatum odoratum also tonifies qi.