English name:YanhusuoLatine name:Rhizoma CorydalisSpecification:slice, whole, various kinds or specification Description:1, Irregularly oblate 2,0.5-1.5cm in diameter 3, Externally yellow or yellowish-brown 4, Irregularly reticulate-wrinkled 5, Apex with slight dented stem scars 6, Usually with tuberculate base 7, Texture hard and fragile 8, Fracture yellow, horny, waxy-shinny 9, Slight odour 10, Bitter taste