Only the seller will participate in option trading, and the deposit not exercised by the option seller will be returned to the seller after the contract expires. If the buyer fails to exercise the right when the option contract expires, the deposit paid by the seller will be returned to the seller.

It should be noted that within the validity period of option contracts, the seller must perform its obligations in accordance with the requirements and standards stipulated in the contract. If the seller fails to meet these requirements and standards, it may cause the seller to pay additional compensation or fines, and the deposit may be confiscated. Therefore, when trading options, the seller should carefully read and understand the terms of option contracts and ensure that he can bear the corresponding risks.