Astragalus membranaceus, also known as Mianqi. Herbs perennial, 50- 100 cm tall. The taproot is thick, woody, usually branched and grayish white. The stem is erect, with many branches on the upper part, thin ribs and white pilose. Herbs perennial, 50- 100 cm tall. Produced in Inner Mongolia, Shanxi, Gansu, Heilongjiang and other places.

Astragalus membranaceus has been used as medicine for more than 2000 years, which has the functions of enhancing immune function, protecting liver, diuresis, anti-aging, anti-stress, lowering blood pressure and extensive antibacterial. However, it should not be used for patients with superficial evil, excessive qi stagnation and dampness, food stagnation, carbuncle initial collapse or after collapse.