Shanghai green is a kind of Chinese cabbage with fewer leaves and more stems. The stems are as white as a gourd ladle. So Shanghai green is also called gourd ladle white. Shanghai green is characterized by its long "aboveboard", every leaf is green, and every leaf has completed the photosynthesis of chlorophyll during the growth period. Shanghai Qing is a kind of common Chinese cabbage with leaves as its products, which is native to China. Jia Sixie in the Northern Wei Dynasty recorded planting in Qi Yao Min Shu. Chinese aliases include green vegetables, pickled cabbage, bottled vegetables, Chinese cabbage, small rapeseed, Xiaotang cuisine (Hong Kong, Macao and Guangdong), soup spoon cuisine, soup spoon cuisine and Qingjiang cuisine (Taiwan Province Province). Chicken feather (seedling) originated from China and is a very common green leafy vegetable, which is cultivated all over the country. Morphological characteristics: oval leaves, thick petiole, blue-green, waist-tied, beautiful and tidy, fine fiber, sweet taste and good taste. In a suitable environment, Shanghai Green likes to be cool. It grows best under the conditions of 18~20℃ and sufficient sunlight, and can safely overwinter at -2~-3℃. Some varieties can also be cultivated in summer, so we must choose suitable varieties according to the season. Farming soil is loam or sandy loam with good drainage and sufficient sunshine. However, rape is also a variety of Chinese cabbage. Anyway, Shanghai green and rape belong to the cabbage family!