Futures trading refers to the contract of bulk commodities, including contract name, trading unit, quotation unit, minimum price change, maximum daily price fluctuation limit, contract delivery month, trading time, last trading day, trading margin, trading fee, etc. The contract you asked should be the terms of the contract reached by both parties. Generally, some products or ownership will be transferred through contracts, and breach of contract may result in liquidated damages, and some contracts are guaranteed by third parties. Futures contracts are standardized contracts bought and sold on futures exchanges. You can buy and sell transactions as long as you open an account. You can buy first and then sell, or you can sell first and then buy back. If a contract is signed, the price must be stated. If it is cashed at maturity, futures are relatively free and can be operated at any time, and there is no other form of signing. Futures can be hedged and cannot be delivered in kind. Futures contracts specify a standardized and unified delivery warehouse for the physical delivery of futures transactions.