You may not understand the significance of such hedging. For example, if you come from Coca-Cola Company, you need a lot of sugar to make Coke. You bought100t of white sugar in May at 3,000 yuan per ton, but you are worried that the price will fall next month and your white sugar will be lost in vain, so you can sell the white sugar contract through the futures market, that is, short the white sugar contract. If you sell a sugar contract with a price of 3,000 yuan per ton, and then the price really drops to 2,800 yuan, you will earn 200 yuan per ton by shorting futures, but your spot will lose 2,000 yuan per ton. It is equivalent to going long and short at the same time.