How to inquire about Apple's return to factory for repair?

Apple returned to the factory for maintenance inquiry as follows:

Tools/raw materials: Lenovo Xiaoxinchao 7000- 13, windows 10, Baidu browser 8.7.5000+0.100000000007.

1. Enter the website of Apple official website in the browser and press enter.

2. Open official website's homepage and click Technical Support.

3. After entering the page, click Apple Maintenance.

4. Click to track the status of existing maintenance.

5. Enter the maintenance ID and serial number, and click Submit to query the maintenance status.