Anonymous report
If you don't want to disclose your personal information, you can choose to report it anonymously to the local education bureau. This can protect your rights and interests without worrying about personal information being leaked.
Written report
If you prefer a written report, you can choose to print the document and mail it to the Education Bureau. But please be sure to ensure the authenticity of the content and avoid falling into legal disputes because of fabricating facts.
Contact the TV station
Another effective way is to contact local TV stations, which usually interview and expose such problems. This will let more people know the truth of the matter and urge relevant departments to take action.