2. Radix Astragali and Radix Angelicae Sinensis are the components of Danggui Buxue Decoction, which is a famous prescription. The dosage of Radix Astragali 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, promoting diuresis to reduce swelling, supporting sores and promoting granulation. Angelica sinensis is a blood-enriching drug, which has the function of enriching blood and blood.