Among them, green vegetables include rape. According to scientific theory, Christina is a kind of Chinese cabbage, which is characterized by fewer leaves and more stems, and the stems are white, like a gourd ladle. Therefore, Shanghai Qing is also called Park Pak. Shanghai's green space is not big, about half a foot long. The leaves are brighter.

Rape has cylindrical stems, alternate leaves, yellow flowers, long flowering period, long horns and red, black and Huang San colors. High oil content. The color of the leaves is dim.