The second is to see the teacher. Since you have enrolled in the postgraduate remedial class, of course, you should ask the teacher to give a lecture. If the teacher is not good, then you don't have to waste money.

The first two points are very important. Finally, it depends on the price. Many postgraduate institutions will know by comparison. In fact, everyone's course services are similar.

I signed up for 333 courses in postgraduate education. The teacher is good and the price is not expensive.