1. Open the parent APP of the e-student card of the mobile phone. If you haven't downloaded it, you can search for "Mobile Electronic Student Card Parent app" in the app store to download it.

2. Select "Bind Mobile Phone" in the APP, enter the parent's mobile phone number and SMS verification code, and click "Next".

3. Next, select "Add Family Number", enter parents' names and ID numbers, and click "Next". Next, select "Binding Family Number", enter the parent's mobile phone number and verification code, and click "Finish".

4. After the binding is successful, parents can view the child's call records, SMS records, traffic usage and other information in the APP, and can also set the child's online time and limit the online content.