Because the seller only needs to send the qualified goods to the delivery warehouse designated by the exchange for acceptance, as to which buyer to pair with is a matter of the exchange, the buyer and the seller simply don't know and don't need to know who the final delivery partner is.
When the buyer receives the spot, he does not choose the delivery warehouse at will, but the exchange draws lots to choose, and you can pick up the goods wherever you go. For example, if you buy 100 lots of Dalian soybeans as a buyer, the warehouse receipt you get at the final delivery may be in Dalian's delivery warehouse, Heilongjiang (if Dalian Commodity Exchange has a delivery warehouse in Heilongjiang), or Jilin. ......
However, delivery warehouses in different locations will have a premium in price, because there is a freight factor in it. For example, the price of your delivery in Dalian is 3,000 yuan/ton, and the delivery in Jilin may be 2,985 yuan/ton (soybean of the same grade), because there are factors of freight compensation (reflected in price increase and discount).