A family of vegetables, angiosperms, dicotyledonous plants. Mostly herbs. Pickled mustard is a kind of mustard, usually refers to leaf mustard, such as nine mustard, potherb mustard, pig blood mustard, bean curd, etc. Pickled cabbage is a semi-dry, non-fermented salted vegetable, which is preserved by using mustard as raw material. It is one of the most famous products in China, and it is the world's three famous pickles. It was found in fuling, sichuan province, China in 1898. It is called "pickled vegetable" because it is required to extract water from the dish during processing. Now it has developed into more than 30 cities and counties in sichuan province, zhejiang, fujian, jiangsu, Shanghai, hunan, guangxi, Taiwan and other provinces (municipalities directly under the central government and autonomous regions).