1. Open the third-party payment platform and click "Invoice Manager". If "Invoice Manager" is not used recently, please click "More" to add it; 2. Click "Invoice Lottery" under "Invoice Manager"; 3. Click the scan icon on the right of "Invoice Code" and turn on the camera to scan the QR code on the invoice; 4. After scanning is completed, the information such as Invoice Code, Invoice Number, Invoice Amount, Invoice Date, Invoice Type and Invoice Location will be automatically filled in. After checking, click "Start Lottery".