Generally speaking, it is determined by the number, type and scope of students admitted by the school.
Now that you have been admitted, wait patiently. For the details of the notice, you can call the admitted institutions.
Notifications are generally sent by express mail, and the sender's address, telephone number and recipient are filled in by candidates when they fill in the college entrance examination volunteers (many candidates fill in the middle school address). According to the distance and traffic conditions, it is expected to arrive in 2-5 days.