(Baidu) Xinlimei radish juice contains a kind of pigment, called anthocyanin, which is a kind of water-soluble pigment. The color is reddish in acidic solution, but purple-blue in alkaline environment. Therefore, vegetables containing this pigment can make their color more bright red after being pickled. For example, when radish is used in cold salad, adding proper vinegar can not only disinfect the dishes, but also make the color of the dishes brighter and improve the sensory quality of the dishes.