1. Enter the China Southern Airlines app and click "Seat Information" on the page.
2. Click "Cancel Seat Selection" on the "Seat Information" page.
3. After entering the "Cancel Seat Selection" page, check the precautions for seat selection, and then click "Continue".
4. Enter the verification code as prompted in the picture, and then click "Cancel Seat Selection". When the prompt "You have successfully canceled seat selection" is displayed, it means that the check-in has been successfully canceled.
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