The course is simple and easy to understand, and there are various monthly exam simulations and annual real questions. I am quite satisfied. Because there is something you don't understand, you can get the answer quickly by leaving a message on the courseware. The wrong brush questions are analyzed in detail. I'm going to sprint to study and take the exam early next year. The teacher's content is easy to understand, and the service staff is also very professional, giving very professional help according to my needs.