The scientific name of Ercai is "Baozi mustard", a kind of mustard. The short stems and axillary buds of Ercai are edible, with high nutritional value, rich water content, crisp and refreshing taste, and the unique fragrance of Cruciferae plants, mostly fresh.
The cultivation area of Ercai was originally limited to Sichuan Basin (Sichuan-Chongqing area), and then gradually developed to the middle and lower reaches of the Yangtze River and surrounding areas such as Guizhou, Yunnan, Hubei, Hunan, Jiangxi, Anhui, Zhejiang, Jiangsu and Shanghai.
The main local varieties are Nanchong Ercai, Chuannong 1 No.,Linjiang Ercai, etc. There are also purified, rejuvenated and improved commercial seeds in the market, such as Pangduoduo, Wan Teng and Minhaha Special Early Ercai.