1. Tax policies and regulations inquiry: users can get the latest tax policies and regulations information by scanning the QR code or barcode, so as to better understand and abide by relevant laws and regulations.

2. Inquiring about tax registration information: Users can scan the QR code or barcode on the tax registration certificate and inquire about their tax registration information in the electronic tax bureau.

3. Pay personal income tax: Users can pay personal income tax by scanning the QR code or barcode of third-party payment platforms such as Alipay and WeChat.