This product is 30- 100cm long. Rhizomes are short and thick, with yellowish fine roots. The stem is round and straight, with a diameter of 0.2-0.5 cm; The surface is yellow-green, taupe or dark purple-red, ribbed and hairy on the upper part; Fragile, easy to break, fibrous, simple section. Simple leaves alternate, mostly shriveled and broken. After flattening, the whole blade is oval or lanceolate, with a length of 1-9cm and a width of 0.3- 1.5 cm. The tip is slightly pointed or obtuse, the whole or irregularly serrated, and the base descends into a stalk. The head is about 0.7 cm in diameter, arranged in a general shape, with occasional yellow tongue-shaped flowers, many shriveled and twisted, three bracts and lanceolate hatching. Achene is small, and the crown hair is yellow and white. The gas is slightly fragrant and the taste is slightly bitter.

More leaves and greener colors are better. Prepare herbs by frying.

Removing impurities, spraying clean water, cutting, and drying. The taste is slightly bitter, pungent and flat.