I don’t understand what you are saying. What is a spot month and what is a main force month? If you buy a contract and do not close the position until the delivery month, there are two consequences: First, the legal person account can enter the delivery and exchange the money for the spot warehouse receipt. Then you can choose to liquidate the warehouse receipt or hold the warehouse receipt and wait. The first time you sell the contract until the delivery month, use this to exchange for new money; the second is an individual account, that will be a tragic ending of being forcibly liquidated before the delivery date, haha.