I signed up for the class of BT tax accountant, but I don't feel very good. First, I said I could enjoy those online school services, but I didn't. I just broadcast the course live. For example, I said that I would push the review materials the next day after studying at night, but I didn't. I said that I have a class teacher who can always answer questions. The class teacher usually takes a long time to reply. I asked questions and he answered, but he ignored me. Second, I bought you a courseware. Generally speaking, advertisements are well done and attractive, and will not be repurchased.