Premium and discount are used when you want to deliver, that is, you want to get the physical object from the futures market or hand it over to the futures exchange.

The standard delivery in the futures market is grade 2 rice. . . You take better 1 grade rice for delivery. . The exchange will give you a ton of water, 50 yuan. . I'll give you 50 yuan more per ton, 3 meters, and it doesn't matter if the photos are even worse than the requirements. I'll give you a discount of 50 yuan, that is, 50 yuan, per ton. . Do you understand?