If you don't want to go to that school, you won't quit unless you have a criminal record or something (other schools won't admit you). If you don't report it then, you will be disqualified.

The electronic file shows "pre-admission", which means that your file has entered the school and can no longer flow. The school has passed the exam and is ready for admission. Then the school will submit all the pre-admission lists to the Admissions Office for review and seal. Pre-admission will definitely be accepted. Although it needs to be reviewed by the Admissions Office, it will not be rejected if there are no major problems unrelated to the college entrance examination.

This year, it is also stipulated that you can't resign unless you have sufficient reasons. Your classmate changed from pre-admission to resignation. You should contact the school admissions office immediately to confirm whether it is the school's breach of contract or the provincial and municipal admissions offices' unqualified audit, such as: unauthorized transfer of household registration, affiliation with ethnic minorities, criminal record, major infectious diseases, etc.