Hello, the expiration date of the option contract is the fourth Wednesday of the expiration month. If the day is a national holiday and the Shanghai Stock Exchange is closed, it will be postponed to the next trading day. The last trading day and exercise date of the option contract are the same as its expiration date; If the maturity date is advanced or postponed, the last trading day and exercise date will be adjusted accordingly. However, under special circumstances stipulated by business rules, the last trading day and exercise date can be adjusted asynchronously.