2. Radix Astragali combined with Radix Angelicae Sinensis has the function of invigorating qi and nourishing blood, and can be used to treat palpitation, palpitation, insomnia and dreaminess, pale lips and tongue, sallow complexion, shortness of breath and fatigue, spontaneous sweating and other symptoms caused by deficiency of both qi and blood. Radix Astragali combined with Radix Angelicae Sinensis is a famous prescription of Danggui Buxue Decoction. The dosage of Astragalus membranaceus is relatively large, and the ratio of them is 6: 1. Astragalus membranaceus is a kind of medicine for invigorating qi, which mainly has the functions of invigorating qi, consolidating exterior, inducing diuresis to reduce swelling, and promoting granulation. Angelica sinensis is a blood-enriching drug, which has the effect of enriching blood. The combination of the two drugs has a good effect of invigorating qi and nourishing blood, and they are often used together in clinical treatment.