It is better to buy cooking oil at home. Bottled oil in supermarkets looks very cheap, and even some big brands use genetically modified soybeans bought from abroad to extract oil. Low cost will definitely bring down the price. In particular, some small brands of oil can indeed be compared with mineral water in price, which is definitely not good oil. Soybean and rapeseed in rural areas are harvested in the field, and even if they are not refined, the price is higher than that of oil. Anyway, if you want to eat good oil now, you have to go back to the countryside to buy it.