"Fat oil" refers to the oil made from animal fat. Leviticus 3:17 says, "This shall be a lasting ordinance for the generations to come, wherever you live, that you shall not eat any fat or blood." What is said is "fat oil", "fat oil" refers to the oil refined from animal fat, rather than the soybean oil and vegetable oil that we eat daily. Vegetable oil Vegetable oil is a plant kernel rich in oil as raw material, after cleaning, husking, crushing, softening, rolling, extrusion and other pretreatment, and then by mechanical pressing or solvent leaching method to extract crude oil, and then refined to obtain. According to the variety, quality and processing technology of oil in China, the quality grade of vegetable oil is determined. According to the quality standard system of edible vegetable oil in China, the general edible vegetable oil on the market (except olive oil and special fats) is divided into four grades: first, second, third and fourth. For example, soybean oil, rapeseed oil, cottonseed oil, rice bran oil, corn oil, sunflower oil, leached peanut oil, leached oil and tea seed oil are divided into one to four levels, while pressed peanut oil, pressed oil and tea seed oil, sesame oil, etc., are only one and two levels.