Compared with Xiaoqu, Daqu has higher medicinal value, and has the functions of preventing and treating anemia and relieving summer heat. Bitter vegetables are rich in carotene, vitamin C, potassium salt, calcium salt, etc., which has a good effect on preventing and treating anemia, maintaining normal physiological activities of human body, promoting growth and development, and relieving summer heat and health care.

Qu Cai, also known as: Stichopus Japonicus, Stichopus Japonicus, Qu Cai, Qingqing Cai, shepherd's purse, Capparis spinosa, Chick's Horn, Calf's Horn, Wild Safflower, etc., is the dry aerial part of Stichopus Japonicus, a compositae plant, with cylindrical stem, gray-green or purplish surface, longitudinal edges and white fur. Brittle, easy to break, hollow section. Leaves alternate, sessile or shortly stipitate. The leaves are shriveled or broken, and the intact ones are oblong or oblong-lanceolate after flattening, and the whole edge or micro-teeth are split to pinnate, and the tips of the teeth have acupuncture. The upper surface is green-brown, the lower surface is gray-green, and both sides are white pilose. The head is single or several terminal. Involucre bell-shaped, bracts 5 ~ 8 layers, yellow-green. The flowers are purplish red. Slight gas and bitter taste.