Don't believe that the layman is a big liar. First, he tricked you into signing up for a basic class, and then he upgraded you to a vip class. All kinds of cajoling are nothing more than refund of fees. They are all deceptive. The exam is coming, and he will let you pay for all kinds of secret papers and examination papers. Even if you fail the exam, you won't get a refund. Find various reasons to prevaricate, saying that you didn't meet their requirements, saying that you can't get a refund until you finish thousands of questions, and saying that you should listen to all classes. How many people can do this? When I signed up for class, I didn't ask for a refund, only that there was no refund and no request. I hope everyone can learn a lesson and don't be fooled again.