Astragalus membranaceus: the root is cylindrical, 30-90 cm long and 0.7-3.5 cm in diameter. The surface is light brown to light brown, and some reticular fiber bundles can be seen after peeling off the skin, which is slightly fragrant, slightly sweet and has a beany smell. Scutellaria baicalensis Georgi: The root is conical, 8-25cm long and 1-3cm in diameter. The surface is brown or dark yellow, the epidermis is rough, with irregular network, and the lower part is smooth and wrinkled, with bitter taste and cold nature.