The big rape is called Brassica napus. According to the relevant public information, rape, also known as oil cabbage and bitter vegetable, is the tender stem and leaf of Cruciferae rape, native to China and dark green in color. For example, Chinese cabbage is a variety of Cruciferae cabbage. All plants cultivated as oil plants in Brassica of Cruciferae are collectively called rape, which can be divided into mustard type, cabbage type and cabbage type according to their morphological characteristics, among which cabbage type plants are tall, with strong taproots and medium branches.