Olive oil is much more expensive than salad oil. Suggestion: Olive oil is best used as a seasoning for vegetables. As I am a northerner, all the vegetables stored in winter are Chinese cabbage. Here are some collocation methods of Chinese cabbage. Wash the Chinese cabbage, slice it, shred it with salt, shred carrots, green peppers and purple onions, squeeze out the water by hand when the Chinese cabbage comes out, and then put all the raw materials we have prepared together. Mainly Chinese cabbage, but also with any vegetables and fruits, such as pears.