1. Log in to the account of Tik Tok advertiser.
2. Enter the advance order management page and find the advance order to be confirmed in the "Advance Order" tab.
3. Select the pre-order to be confirmed and click the "Confirm" button.
4. Fill in the confirmation information of the pre-order in the confirmation pop-up window, including information such as service type, specific service time and service address, and click "Confirm" to complete the operation.