Yes, Astragalus is a good medicine for invigorating qi, mainly for tonifying deficiency. It is often used for people with long-term physical decline, weak speech and weak pulse. Some people are prone to catch a cold when the weather changes, which is called "duplicity" by Chinese medicine. Astragalus membranaceus can be used to strengthen the exterior, and taking Astragalus membranaceus regularly can avoid frequent colds. However, there is a side effect, and the most common side effect is the symptom of "getting angry" quickly. Cassia seed tastes bitter, sweet, salty and slightly cold. Cassia seed just neutralizes the above-mentioned side effects of astragalus, and the two are just right.