1. Confirm error: First, make sure that this error is true. You can check the relevant official documents or evidence, including the school website, enrollment brochures, publicity of the education department and so on.
2. Contact the school: If there is any mistake, I suggest you contact the relevant person in charge of Tianshui the great wall middle school or the education department to explain the mistake and ask how to correct it.
3. Correct public channels: You can correct wrong information through appropriate public channels, such as providing correct information to official website, media or social media platforms in schools and asking them to correct it.
4. Keep evidence: In the process of correction, you must keep relevant evidence, such as screenshots and documents, in case of emergency.
It should be noted that the above suggestions are for reference only, and the specific correction method may need to be adjusted according to the actual situation. In addition, if you have tried your best to correct your mistakes and still can't get satisfactory results, you can consider complaining to the education department or consulting relevant legal experts for more help.