These four herbs in Li Jiren Health Tea are all tonics. The function of American ginseng is basically similar to that of Codonopsis pilosula and Ginseng, but it is cool, and when combined with warm Lycium barbarum, it is cold and warm, which plays the role of invigorating qi and enriching blood. In addition, Astragalus is a "tonic" that can nourish the qi of the five internal organs; Polygonatum sibiricum has the effect of "tonifying deficiency and replenishing essence", which is mainly used for enriching blood. The combination of the four drugs can achieve the effects of regulating qi and blood, dredging meridians and activating collaterals.