Rapeseed, also called oily cabbage and sour cabbage, is the tender stems and leaves of the cruciferous plant rapeseed. It is native to my country and is dark green in color, like cabbage. It is a variant of Brassicaceae. It is widely cultivated in the north and south, and can be produced in all seasons. Rapeseed contains a variety of nutrients and is rich in vitamin C.

Spinach is an annual or biennial herb in the Chenopodiaceae family. Also known as spinach and Persian grass. The leaves and young stems are eaten. It is native to Persia and was cultivated 2000 years ago. Later it spread to North Africa and then to Western Europe, Spain and other countries by the Moors. Spinach was introduced to the Tang Dynasty in 647 AD. Spinach has a well-developed taproot, a red fleshy root, and is sweet and edible. Spinach is a cold-tolerant vegetable and a long-day plant. In northern China, there are also types of spinach that are sown in winter and harvested in spring, commonly known as head-down spinach. Drill or broadcast can be used. The main diseases of spinach include downy mildew, viral diseases, and anthracnose. The main pests include aphids, leaf miners, etc.