You can't change schools when you are admitted, because your file has been transferred from this school, which means that there is no information about you where the admission work is carried out. At this time, you can either go to the accepted school or you can't be admitted to other schools.

It is basically impossible for universities to continue studying in domestic schools. If you really want to change schools, you can see if there are any exchange programs in the school. Some schools can apply to study in foreign universities, and some schools can study in institutions that have cooperative relations with schools. Ask the school. Finally, repeat reading and transfer. After the college entrance examination is accepted by the university, you don't have to apply. After the school starts, the school will automatically return the electronic files. You can go directly to the repeat school to study then.