If not, running a school is illegal. Local neighborhood offices, education committees and other government organizations can ban and crack down on you at any time. Under normal circumstances, it doesn't matter if no one reports it.
In fact, the earliest problem is the source of students, which is the most headache for private schools. The method adopted by ordinary schools is to attract students with teachers and do whatever they want. Young people rarely fight. After becoming bigger and stronger, all problems are floating clouds.