Watercress , also known as watercress , belongs to the cruciferous family and is a one-two-year-old aquatic herb. Watercress is served with tender stems and leaves that are crisp, juicy, green in color, fragrant and refreshing, and rich in nutrients. It is cultivated in Guangdong, Guangxi, Fujian, Taiwan, Shanghai, Sichuan, Yunnan and other places in China. Among them, Guangdong has the longest cultivation history and the largest cultivation area. Watercress has comprehensive nutrients, among which the content of superoxide dismutase (SOD) is high, and it is also rich in vitamins and minerals. Watercress has the function of regulating menstruation, and can interfere with egg implantation and prevent pregnancy. Watercress is sweet and slightly bitter, and cold in nature. It has the effects of clearing dryness and moisturizing the lungs, resolving phlegm and relieving cough, and diuresis. It is a healthy vegetable for brain health.