Select intermediary
First of all, choose several intermediaries from here and choose the advice given by each intermediary to study abroad.
Teacher's responsibility
It depends on whether the teacher is responsible for the students and whether the application process can work closely with the students.
Post-file service
When looking for an institution, you can contact the "study abroad consultant". They are only responsible for selling services and looking for after-school teachers who will eventually help you modify PS, letters of recommendation and resumes. After-school service is very important.
Application result
It depends on the application results. After all, for students, the application result is everything, and the general planning and paperwork are done.