"Ercai", also known as fist dish, Nanchong dish, baby dish and baby dish, is a variety of mustard. The scientific name is "holding mustard", a kind of mustard. The thick roots are surrounded by buds one by one, and many swollen buds grow around the big stems, just as many children surround their mothers in the middle, and one mother has many children. This is the origin of "children's vegetables".

The effects of children's vegetables are detoxification and detumescence, promoting digestion, stimulating appetite, moistening intestines and relaxing bowels. Children's vegetables can also supplement iron, which has certain benefits for diuresis and moisture removal. There are many dietary fibers in children's vegetables, which can accelerate intestinal peristalsis, promote the discharge of feces and effectively prevent constipation.