Importers will buy a batch of goods in two months, fearing that the price will rise and increase the cost, so they will buy futures of the same commodity in the futures market. If the price really goes up, they will use the profits in the futures market to make up for the losses in the spot market. If the price falls, the futures will lose the spot profit and realize hedging. Buy hedging, also known as long hedging, refers to the operation that the hedger expects to hedge the price rise risk of his spot goods or assets or the goods or assets he will buy in the future by establishing long positions in the futures market. Importers in international trade are worried about the loss caused by the rise of exchange rate when paying foreign exchange, which is suitable for multiple hedging.