1. wormwood. Qingtuan is a traditional snack in the south of the Yangtze River. It is blue, mixed with the juice of wormwood into glutinous rice flour, and then wrapped in bean paste stuffing or lotus seed paste. It is not sweet or greasy, with a light but long grass aroma.

2. wormwood is a perennial herb of Artemisia in Compositae, distributed in Asia and Europe, with solitary or few stems, brown or grayish brown, slightly woody at the base, short branches at the upper part, thick papery leaves, grayish white pubescence on the upper part, and usually no false leaves or tiny false leaves at the base. The upper leaves and bract leaves are pinnately cleft, the head is oval, the corolla is tubular or goblet-shaped, the anthers are narrowly linear, and the style is nearly as long as or slightly longer than the corolla. It was born in wasteland, roadside, riverside and hillside in low to medium altitude areas.