The mobile phone number bound in the "Reading Education" applet can be modified in the "My" settings, and an icon will display the modification option.

The specific operation steps are as follows:

1. Scan the following applet code with WeChat "Sweep".

2. Click on "My" in the lower right corner.

3. Click "Login/Register" in the upper left corner.

4. Select the login mobile phone number (note here: WeChat defaults to the local mobile phone number, and it is recommended to choose another mobile phone number if it needs to be replaced).