To check the warranty period of your Xiaomi notebook, you can follow the steps below:

1. Open Xiaomi Mall APP and enter the homepage.

2. Click the "Service" button at the top of the page.

3. In the service interface, click the "Warranty" option.

4. After entering the warranty interface, click the "Warranty Period Query" button.

5. Enter your Xiaomi laptop number to query.

By following the above steps, you can easily check the warranty period of your Xiaomi laptop. If there is a need for repair or after-sales service, you can enjoy free repair service during the warranty period. Please note that it is still recommended to consult relevant professionals for more accurate and detailed information on specific problem solutions.