The pass rate of written test is about 22%. Whether to sign up for class or not depends on how you studied before. If you learn well, you can take the exam yourself. If you can't learn well, to tell the truth, it's very late for you to report to class now, and there is still a month to take the exam. But you can learn about the training of high-end classes in the middle domain. This high-end training is mainly aimed at those who have not studied solidly before, do not know how to review, have no confidence in the exam and want to pass the exam at one time. If you feel that you meet the requirements, you can learn about it.