2. Find the trading window corresponding to the holding contract on the page.
3. In the trading window, find the contract information already held.
4. In the information column of the contract, there will be a liquidation option.
5. Click the liquidation option to open the liquidation confirmation window.
6. In the liquidation confirmation window, confirm the quantity and price of liquidation.
7. After confirmation, click the Confirm Close button to complete the closing operation.