According to the CICC Trading Rules and its related implementation rules, the last trading day of the Shanghai and Shenzhen 300 stock index futures, SSE 50 stock index futures and CSI 500 stock index futures contracts is the third Friday of the contract expiration month, that is, the last trading day of the IF 1507 contract, the IH 1507 contract and the IC 1507 contract is July/KL. On the last trading day, the price limit is 20% of the settlement price of the previous trading day. The last trading day is the delivery date, and the settlement price for delivery is the arithmetic average price of the last two hours of the underlying index on the last trading day, and the delivery fee standard is one ten thousandth of the delivery amount.