Group 1 - The article discusses the transition from paper invoices to electronic invoices for vehicle sales, indicating that the police traffic management department will no longer review paper invoices [2] - Applicants can still use paper invoices to process related business with the police traffic management department, despite the shift to electronic verification [2] - In case of system unavailability of electronic invoice information, applicants can provide a dynamic QR code from the national VAT invoice verification platform for verification by the police [2] Group 2 - The article emphasizes the importance of using the national VAT invoice verification platform for checking invoice authenticity [2] - It provides a link to the national VAT invoice verification platform for users to log in and verify their invoices [2]