1. First, open the Tik Tok APP and click "I" in the lower right corner. In the interface opened in Step 1, click Sanshui in the upper right corner and operate the "Step 2" command button; The interface appears, and click the enterprise service center of the interface.

2. Secondly, after the operation in the second step is completed, an interface will appear. Click on the "group purchase activity" column in the interface to enter the group purchase activity module. In the interface that appears after clicking in the third step, click "Scan Code for Write-off".

3. Finally, after clicking in the fourth step, the interface of scanning QR code appears, which can scan the coupon code of customers.