1. Download or open the Xueyou Youjiao app: First, make sure that the Xuyouyoujiao app has been installed on your phone and open it.

2. Log in to your account: After entering the app, log in with your account.

3. Enter the child management interface:

On the home page of the app or the "My" interface, find and click "Child Management" or a similar option.

4. Add child information:

If the child's information has been unbound, there is usually an option to "Add Child" or "Bind Child" in the "Child Management" interface.

Click this option, and then enter the child's relevant information according to the prompts, such as name, student registration number, etc., to complete adding the child's information.

5. Contact customer service:

If you encounter difficulties in adding a child's information, or if you cannot find the option to add a child, you can try to contact the customer service of Xueyouyoujiao.

You can contact customer service through the customer service function in the app, or through the official website, official phone number, etc. to ask how to retrieve your child's information.

6. Waiting for review:

After adding child information, you may need to wait for system review or teacher review. After the review is passed, the child's information will reappear in your app account.

7. Check message notifications:

During the process of retrieving your child's information, pay attention to the app's message notifications or text messages. There may be relevant notifications or prompts.