Mustard is a vegetable. Mustard is a famous Chinese specialty vegetables, also known as cover vegetables, mustard, hanging vegetables, etc., for the Cruciferae Brassica genus of annual or biennial herbaceous plants. Cultivated throughout the country commonly used vegetables, leaves can be salted for food; seeds ground powder called mustard, for seasoning; pressed oil called mustard oil; this species is an excellent honey plant.

Europe and the United States are rarely cultivated, originated in Asia. Mostly distributed in the provinces south of the Yangtze River, in addition to alpine and arid areas, there is no distribution boundary in China, east to the coastal provinces, west to the Xinjiang Uygur Autonomous Region, south to Sanya City, Hainan Province, north to the city of Mohe, Heilongjiang Province, from the middle and lower reaches of the Yangtze River plains to the Tibetan Plateau are mustard cultivation. The seven most widely cultivated varieties in China are: potherb mustard, squash mustard, oil mustard, large-leafed mustard, multi-fractured-leafed mustard, wrinkled-leafed mustard, and Shuidong mustard.