If it goes up, who will pay? Because cash delivery is based on the latest Shanghai and Shenzhen 300 index price, if it goes up, the money will come from your opponent, because if you don't open your position, someone will definitely open it. If you don't sell it, there must be 1 people who can't draw.

If it falls, you can close your position yourself, or the system will help you to close your position forcibly, and the loss money will be deducted from your account to the person who earned it.