Soybean oil futures soybean oil and spot soybean oil are two different things. The variety name of futures trading is "soybean crude oil", which cannot be eaten directly, and can only be eaten after purification. However, the edible oil produced after the purification of soybean crude oil is divided into first-class and second-class grades, which is the grade of our common spot soybean oil.

The quality standard of soybean oil futures is GB 1535, which stipulates physical and chemical indexes such as moisture and volatile matter, impurities, acid value and peroxide value, and there is no grade. This is just like the crude oil of petroleum has no grades, while the gasoline and diesel oil extracted from crude oil have grades.