Stock index futures will be closed at the settlement price on the delivery date (the arithmetic average price of the last two hours of the Shanghai and Shenzhen 300 spot index on that day) after the market closes on the delivery date.

At present, commodity futures do not allow individual customers to make physical delivery (positions are not allowed in the delivery month), so the futures company will give you a liquidation notice before entering the delivery month. If you don't close your position yourself, the futures company will close your position for you.