As an agricultural product, the price of olive oil will be affected by many factors, such as origin, yield, variety and so on. In order to ensure the stability of the retail price in the market, manufacturers usually lock the cost price in advance by futures. Therefore, the retail prices of some big brands fluctuate very little. Specifically, the price range between different brands, such as tea and liquor in China, has a very large price space, and there is no big difference in essence.