Rape is one of the world's major oil crops, and is an important source of edible oil in China. China's consumption of edible oil comes from rapeseed oil more than 40%. China is one of big country in rapeseed cultivation, and area and output ranks first in the world. There are about 1 million hectares in rapeseed cultivation in China each year, about 14 million tons of rapeseed production, oil content 38%, providing about 5 million tons edible oil. China's oil consumption every year the gap in more than 11 m...